Plunger pump packing state monitoring method and device

Abstract

The invention relates to the technical field of oil and gas exploitation equipment, and provides a plunger pump packing state monitoring method and device.The method comprises the steps that the packing pressure of each packing cavity is obtained through a packing pressure detector installed at the position of the packing cavity in a fluid end valve box of a plunger pump; the discharge pressure of the fluid end valve box is obtained; and monitoring the packing state of the plunger pump according to the discharge pressure of the fluid end valve box and the packing pressure of each packing cavity. The method can timely and accurately identify the state of the packing, timely find the fault of the packing, timely maintain and protect the packing, reduce the damage of the fluid end valve box body caused by the damage of the packing, prolong the service life of the valve box, reduce the sudden fault shutdown of the plunger pump caused by the fault of the packing, improve the use efficiency of the plunger pump on site, and reduce the cost. Therefore, the plunger pump is more stable and reliable in operation, more targeted and more convenient to maintain, and the maintenance time and the maintenance cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas production equipment, and in particular to a method and device for monitoring the state of a plunger pump packing. Background Art

[0002] With the development of shale oil and gas, ultra-high pressure, ultra-deep wells and horizontal wells, the operating conditions are becoming increasingly harsh, requiring high-pressure and large-displacement operations. Therefore, the requirements for plunger pumps are becoming higher and higher. The plunger pump must not only be able to meet the continuous operation of high pressure and large displacement, but also ensure the quality stability under continuous high-load operation, and reduce the downtime and repair and maintenance time of the plunger pump caused by sudden failures.

[0003] The plunger pump is generally composed of a power end and a hydraulic end. The power machine drives the crankshaft of the power end of the plunger pump to rotate, and the crankshaft drives the piston or plunger to reciprocate in the cylinder of the hydraulic end of the plunger pump through the crosshead. Combined with the alternating action of the suction and discharge valves, the purpose of high-pressure pumping is achieved. In this process, the packing and the plunger are dynamically sealed, and the seal is achieved by the radial expansion of the packing. When the plunger pump works for a long time, the alternating load of low pressure and high pressure makes the packing easy to be damaged. If it is not discovered in time, it will cause the valve box of the hydraulic end of the plunger pump to leak, and the plunger pump will suddenly stop, which will seriously affect the operation efficiency and even cause safety accidents.

[0004] At present, the main maintenance methods used at the oil and gas field operation site are manual inspection, video monitoring, planned maintenance, and emergency maintenance. Among them, during manual inspection, since the area where the equipment is located is a high-pressure area, personnel cannot enter, and it is an interval inspection (for example, an inspection every 30 minutes). Due to the long inspection distance and the time interval between inspections, dripping, puncture, etc. cannot be discovered in time, which easily causes the hydraulic end valve box of the equipment body to leak. When using video monitoring, the camera installed at the equipment end monitors the screen for viewing. However, there are multiple pumps on site, and the leakage of a single pump cylinder is not easy to detect, especially when the pump is far away from the camera. In addition, video monitoring is greatly affected by the personal influence of the viewing and monitoring personnel, such as late shifts or lack of concentration, and may not be able to detect the leakage in time, which easily causes the hydraulic end valve box of the equipment body to leak. Planned maintenance requires operators to check whether there is leakage in each packing of more than a dozen or even dozens of pumps on site. Under this maintenance system, personnel need to check each pump and cylinder one by one, which is time-consuming, labor-intensive, and blind. Emergency repair is a rescue repair performed after a device failure. This type of repair usually occurs when the equipment is no longer able to operate normally and parts need to be replaced. At this time, all equipment on the work site needs to be shut down, affecting the progress and efficiency of on-site work. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a method and device for monitoring the status of a plunger pump packing, so as to at least solve the technical problems in the prior art that the plunger pump packing leakage cannot be detected in time, affecting the operation of the plunger pump; and the packing status monitoring is time-consuming and labor-intensive, and the maintenance cost is high.

[0006] In order to solve the above technical problems, the embodiments of the present disclosure adopt the following technical solutions:

[0007] In a first aspect, an embodiment of the present disclosure provides a method for monitoring a state of a plunger pump packing, comprising:

[0008] The packing pressure of each packing cavity is obtained by installing a packing pressure detector at the packing cavity on the hydraulic end valve box of the plunger pump;

[0009] Obtaining the discharge pressure of the hydraulic end valve box;

[0010] The packing state of the plunger pump is monitored according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity.

[0011] In some embodiments, the packing cavity includes the contact position between the hydraulic end valve box and the packing, the contact position between the hydraulic end valve box and the packing pressure cap, the contact position between the hydraulic end valve box and the packing pressure ring, and the contact position between the hydraulic end valve box and the packing spacer ring.

[0012] In some embodiments, a first pressure sensor is installed on each packing cavity, and the packing pressure of each packing cavity is obtained through a packing pressure detector, including:

[0013] The packing pressure of the corresponding packing cavity is obtained by means of a first pressure sensor arranged at each packing cavity.

[0014] In some embodiments, a first pressure connector is installed on each packing cavity, each of the first pressure connectors is connected to a pressure aggregation module, and a first pressure sensor is provided on the pressure aggregation module.

[0015] The packing pressure detector is used to obtain the packing pressure of each packing cavity, including:

[0016] The pressure of the pressure summarizing module is obtained by the first pressure sensor, wherein the cylinders of the hydraulic end valve box work alternately, and the pressure of the pressure summarizing module is the packing pressure of the packing cavity of the current working cylinder;

[0017] The packing pressure of each packing cavity is determined according to the pressure of the pressure summarizing module.

[0018] In some embodiments, monitoring the packing state of the plunger pump according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity includes:

[0019] Determine whether the discharge pressure reaches the packing auxiliary sealing pressure;

[0020] If so, determining whether the packing pressure exceeds a preset packing pressure threshold;

[0021] If the packing pressure exceeds the preset packing pressure threshold, it is determined that the packing is abnormal.

[0022] In some embodiments, the preset packing pressure threshold includes multiple thresholds determined according to the packing abnormality level, and judging whether the packing pressure exceeds the preset packing pressure threshold includes:

[0023] The packing pressure is compared with preset packing pressure thresholds arranged from small to large step by step to determine the state of the packing.

[0024] In some embodiments, before determining whether the discharge pressure reaches the packing sealing pressure, the method further includes:

[0025] Determining whether the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable;

[0026] Determining whether the discharge pressure reaches the packing sealing pressure includes:

[0027] If the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable, the operating condition of the plunger pump is determined according to the operating state of the plunger pump;

[0028] Under the operating conditions, it is determined whether the discharge pressure reaches the packing auxiliary sealing pressure.

[0029] In some embodiments, determining whether the operating state of the plunger pump is stable includes:

[0030] The operation status information of the plunger pump is obtained by setting an operation detector at one end of the crankshaft of the plunger pump, wherein the operation status information of the plunger pump includes at least one of the operation speed of the plunger pump, the crankshaft position information of the plunger pump and the plunger position information, and the operation detector is an even-toothed code disk, or the operation detector is a toothless code disk and a key phase sensor;

[0031] Whether the plunger pump is running stably is determined according to the running status information.

[0032] In some embodiments, the method further comprises:

[0033] According to the abnormal state of the packing, a corresponding alarm prompt message is generated;

[0034] The alarm prompt information includes at least one of a cylinder with packing abnormality, abnormality level information, and abnormality handling information.

[0035] In a second aspect, an embodiment of the present disclosure provides a plunger pump packing state monitoring device, comprising:

[0036] A first acquisition module is configured to acquire the packing pressure of each packing cavity through a packing pressure detector installed at the packing cavity on the hydraulic end valve box of the plunger pump;

[0037] A second acquisition module is configured to acquire the discharge pressure of the hydraulic end valve box;

[0038] The monitoring module is configured to monitor the packing state of the plunger pump according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity.

[0039] In a third aspect, an embodiment of the present disclosure provides an electronic device, comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned plunger pump packing status monitoring method when executing the computer program on the memory.

[0040] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the above-mentioned method for monitoring the state of a piston pump packing is implemented.

[0041] The disclosed embodiments provide a method and device for monitoring the packing status of a plunger pump, which obtains the packing pressure at each packing cavity by means of a packing pressure detector installed at the packing cavity on the hydraulic end valve box of the plunger pump; and obtains the discharge pressure of the hydraulic end valve box; and monitors the packing status of the plunger pump according to the discharge pressure of the hydraulic end valve box and the packing pressure at each packing cavity, so as to timely and accurately identify the packing status, timely discover packing failures, and timely perform repairs and protections, thereby reducing damage to the hydraulic end valve box body caused by packing damage, thereby improving the service life of the valve box, and at the same time, reducing sudden failure and shutdown of the plunger pump caused by packing failures, improving the use efficiency of the on-site plunger pump, making the operation of the plunger pump more stable and reliable, and making maintenance more targeted and convenient, thereby reducing repair time and repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 A first flow chart of a method for monitoring a state of a packing of a plunger pump according to an embodiment of the present disclosure;

[0044] Figure 2 It is a structural schematic diagram of a plunger pump according to an embodiment of the present disclosure;

[0045] Figure 3 It is a cross-sectional view of a hydraulic end valve box of a plunger pump according to an embodiment of the present disclosure;

[0046] Figure 4 for Figure 3 Schematic diagram of the partial enlarged structure of the middle plate root cavity ( Figure 3 The middle circle A part);

[0047] Figure 5 It is an enlarged structural schematic diagram of the packing of the embodiment of the present disclosure;

[0048] Figure 6 It is a schematic diagram of the first arrangement structure of the packing pressure detector on the hydraulic end valve box;

[0049] Figure 7 It is a schematic diagram of the second arrangement structure of the packing pressure detector on the hydraulic end valve box;

[0050] Figure 8 for Figure 2 Schematic diagram of the enlarged structure of the middle code disk ( Figure 2 (part B in the middle circle);

[0051] Fig. 9 A second flow chart of the method for monitoring the state of a plunger pump packing according to an embodiment of the present disclosure;

[0052] Fig.10 is a third flow chart of the method for monitoring the state of a plunger pump packing according to an embodiment of the present disclosure;

[0053] Fig.11 It is a schematic structural diagram of a plunger pump packing condition monitoring device according to an embodiment of the present disclosure.

[0054] Reference numerals:

[0055] 1-hydraulic end valve box; 2-packing cavity, 21-packing, 211-first hard disk root, 212-second hard disk root, 213-floppy disk root, 214-V-shaped lip, 22-packing cap, 23-packing ring, 24-packing spacer; 3-plunger; 4-crankshaft; 5-pressure detector, 51-first pressure sensor, 52-pressure connector, 53-pressure summary module; 6-cylinder body; 7-second pressure sensor; 8-toothless encoder; 9-key phase sensor. DETAILED DESCRIPTION

[0056] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0057] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0058] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0059] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0060] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0061] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0062] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0063] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0064] Figure 1 A flow chart of a method for monitoring the state of a piston pump packing according to an embodiment of the present disclosure is shown. Figures 2 to 8 The structure diagram of the plunger pump and monitoring components (including pressure detector, discharge pressure sensor, operation detector, etc.) of the embodiment of the present disclosure is shown. Figures 1 to 8 As shown, a method for monitoring the state of a plunger pump packing provided by an embodiment of the present disclosure includes:

[0065] S101: Obtain the packing pressure of each packing cavity 2 through the packing pressure detector 5 installed at the packing cavity 2 on the hydraulic end valve box 1 of the plunger pump.

[0066] The plunger pump includes a hydraulic end and a power end, the hydraulic end includes a hydraulic end valve box 1, a packing cavity 2 is provided in the hydraulic end valve box 1, one end of the plunger 3 is located in the packing cavity 2, and the other end extends out of the hydraulic end valve box 1 and is connected to the power end, and the power end includes power components such as a crankshaft 4. In this step, the pressure detector 5 provided at the packing cavity 2 can be used to detect and obtain an accurate packing pressure value in real time.

[0067] like Figures 3 to 5 As shown, the packing cavity 2 includes the contact position between the hydraulic end valve box 1 and the packing 21, the contact position between the hydraulic end valve box 1 and the packing pressure cap 22, the contact position between the hydraulic end valve box 1 and the packing pressure ring 23, and the contact position between the hydraulic end valve box 1 and the packing spacer ring 24.

[0068] The packing 21 of the plunger pump is composed of a soft packing and two hard packings, namely a first hard packing 211, a second hard packing 212 and a soft packing 213. The hard packing has a V-shaped lip 214, and its opening faces the high-pressure cavity of the hydraulic end valve box 1.

[0069] The packing seal is a self-sealing seal and also a contact seal. Its sealing function mainly relies on the pressure of the liquid delivered in the hydraulic end high-pressure cavity to open the two hard disk root V-shaped lips 214 in the packing 21 and make close contact with the plunger surface and the inner wall of the hydraulic end valve box packing cavity 2 to seal. The soft disk 213 mainly plays a supporting role. If the packing 21 is not damaged, when the hydraulic end valve box 1 delivers the liquid pressure to a certain pressure, the pressure of the delivered liquid presses the packing 21, so that the opening of the packing V-shaped lip 214 increases, which plays a pressure-assisted sealing role for the packing 21. After the packing 21 is sealed, the pressure behind the first hard disk root 211 is maintained in a certain pressure range. After the packing 21 is damaged, the pressure here is different due to the different damage sizes. Therefore, in this embodiment, the packing damage monitoring is performed according to this characteristic, and the abnormality of the packing 21 can be identified in advance.

[0070] Preferably, the pressure detector 5 is arranged at the position of the first hard disk root V-shaped lip edge and / or the second hard disk root V-shaped lip edge ( Figure 4 The position of the middle dotted line box) can more accurately and sensitively detect the pressure changes in the easily damaged parts of the packing 21.

[0071] The hydraulic end valve box 1 includes a plurality of cylinder bodies 6 (for example, five cylinder bodies), each of which has a packing cavity 2 and a plunger 3 .

[0072] In some embodiments, each packing cavity 2 is respectively installed with a first pressure sensor 51. In step S101, the packing pressure of each packing cavity is obtained by the packing pressure detector 5, including:

[0073] S1011: Obtain the packing pressure of the corresponding packing cavity 2 through the first pressure sensor 51 arranged at each packing cavity 2.

[0074] In this step, if Figure 6 As shown, a first pressure sensor 51 may be provided at each packing cavity 2 to detect the pressure of the packing cavity 2 corresponding to the first pressure sensor (packing pressure sensor) 51. There may be one or more first pressure sensors 51 provided at each packing cavity 2. Multiple first pressure sensors 51 may be provided at a single packing cavity 2, for example, a first pressure sensor 51 may be provided at the position of the first hard disk root V-shaped lip and the second hard disk root V-shaped lip, respectively, to further ensure the pressure detection accuracy.

[0075] In some other embodiments, each packing cavity 2 is respectively installed with a pressure connector 52, each of the pressure connectors 52 is respectively connected to a pressure aggregation module 53, and a first pressure sensor 51 is provided on the pressure aggregation module 53. In step S101, the packing pressure of each packing cavity is obtained through a packing pressure detector, including:

[0076] S1012: Obtain the pressure of the pressure summarizing module 53 through the first pressure sensor 51, wherein the cylinders 6 of the hydraulic end valve box 1 work alternately, and the pressure of the pressure summarizing module 53 is the packing pressure of the packing cavity 2 of the current working cylinder 6;

[0077] S1013 : Determine the packing pressure of each packing cavity 2 according to the pressure of the pressure summarizing module 53 .

[0078] like Figure 7 As shown, since the cylinder bodies 6 of the hydraulic end valve box 1 work alternately, a pressure connector 52 can be respectively set at each packing cavity 2, and the pressure at each packing cavity 2 is aggregated to the pressure aggregation module 53 through the pressure connector 52. The first pressure sensor 51 set on the pressure aggregation module 53 is used to obtain the packing pressure at the packing cavity 2 of the currently working cylinder body 6. In this way, in combination with the alternate work of the cylinder body 6, the packing pressure of each packing cavity 2 can be alternately obtained through the first pressure sensor 51, thereby reducing the number of arranged first pressure sensors 51 and the pressure detection cost.

[0079] In this step, if the cylinders 6 work alternately in sequence, the packing cavity 2 corresponding to the pressure detected by the first pressure sensor 51 can be determined according to the preset cylinder working order. If the cylinders 6 do not have a specific working order, it is necessary to determine the currently working cylinder 6, and then determine the packing cavity 2 corresponding to the pressure currently detected by the first pressure sensor 51, so that the packing pressure of the corresponding packing cavity 2 can be obtained in real time according to the real-time working cylinder 6.

[0080] S102: Obtain the discharge pressure of the hydraulic end valve box 1.

[0081] like Figure 1 As shown, the discharge pressure of the hydraulic end valve box 1 is the discharge pressure of the plunger pump, which can be obtained by a second pressure sensor (discharge pressure sensor) 7 arranged on the discharge end flange side of the hydraulic end valve box 1; the discharge pressure can also be directly obtained through the equipment end. For example, when the plunger pump is working, the display module on the hydraulic end valve box 1 displays the discharge pressure of the hydraulic end valve box 1.

[0082] S103: monitoring the packing state of the plunger pump according to the discharge pressure of the hydraulic end valve box 1 and the packing pressure of each packing cavity 2.

[0083] Since the packing 21 is affected by the pressure of the liquid delivered by the hydraulic end valve box 1, in this step, the packing pressure at each packing cavity 2 can be analyzed in combination with the discharge pressure of the hydraulic end valve box 1, so as to timely and accurately identify the state of the packing 21, monitor the packing state of the plunger pump, and timely discover the packing failure for timely maintenance and protection. If the packing 21 is monitored to be normal, no processing is required; if the packing 21 is monitored to be abnormal, it is determined that the packing 21 may be damaged and needs to be processed in time.

[0084] The method for monitoring the packing state of a plunger pump provided in the embodiment of the present disclosure obtains the packing pressure at each packing cavity 2 through a packing pressure detector 5 installed at the packing cavity 2 on the hydraulic end valve box 1 of the plunger pump; and obtains the discharge pressure of the hydraulic end valve box 1; the packing state of the plunger pump is monitored according to the discharge pressure of the hydraulic end valve box 1 and the packing pressure at each packing cavity 2, so that the packing state can be timely and accurately identified, packing failure can be discovered in time, and timely maintenance and protection can be performed, so as to reduce the damage to the hydraulic end valve box body caused by packing damage, thereby improving the service life of the valve box, and at the same time, reducing the sudden failure and shutdown of the plunger pump caused by packing failure, improving the use efficiency of the on-site plunger pump, making the operation of the plunger pump more stable and reliable, and the maintenance more targeted and convenient, thereby reducing the maintenance time and maintenance cost.

[0085] It can be understood that the above step S101 and step S102 can be executed sequentially according to the preset execution steps, or can be executed simultaneously, and the specific execution order is not specifically limited in this disclosure.

[0086] In some embodiments, in step S103, the packing state of the plunger pump is monitored according to the discharge pressure of the hydraulic end valve box 1 and the packing pressure of each packing cavity 2, including:

[0087] S1031: Determine whether the discharge pressure reaches the packing auxiliary sealing pressure;

[0088] S1032: If yes, determine whether the packing pressure exceeds a preset packing pressure threshold;

[0089] S1033: If the packing pressure exceeds the preset packing pressure threshold, determine that the packing is abnormal.

[0090] When performing packing status detection, first determine whether the discharge pressure of the hydraulic end valve box 1 reaches the packing auxiliary sealing pressure. If not, the pressure of the liquid delivered in the hydraulic end valve box 1 will not damage the packing 21. If it reaches, compare the detected packing pressure of each packing cavity with the preset packing pressure threshold to determine whether the packing pressure exceeds the preset packing pressure threshold. If it exceeds, it is determined that the packing 21 is abnormal, and the packing 21 may be damaged or is about to be damaged. In this step, when judging the packing status according to the detected packing pressure, first determine whether the discharge pressure of the hydraulic end valve box 1 reaches the packing auxiliary sealing pressure, without having to judge each detected packing pressure, which can effectively improve the efficiency of packing status monitoring.

[0091] In some embodiments, the preset packing pressure threshold includes multiple thresholds determined according to the packing abnormality level. In step S1032, determining whether the packing pressure exceeds the preset packing pressure threshold includes:

[0092] The packing pressure is compared with preset packing pressure thresholds arranged from small to large step by step to determine the state of the packing 21 .

[0093] In this step, multiple judgment thresholds can be determined according to the abnormality level (also called fault level or damage level) of the packing 21 to accurately judge whether the packing exists and the abnormality level after the abnormality exists, so as to accurately judge the final abnormal state of the packing 21.

[0094] For example, Figures 9 to 11As shown, the first preset packing pressure threshold, the second preset packing pressure threshold and the third preset packing pressure threshold can be set according to the slight damage, moderate damage and severe damage of the packing, wherein the first preset packing pressure threshold, the second preset packing pressure threshold and the third preset packing pressure threshold increase in sequence, the first preset packing pressure threshold is the warning threshold, the second preset packing pressure threshold is the moderate threshold, and the third preset packing pressure threshold is the severe threshold. When comparing the detected packing pressures in sequence, the packing pressure threshold value can be first compared with the first preset packing pressure threshold value. If the packing pressure is less than the first preset packing pressure threshold value, it is determined that the packing is normal and no subsequent comparison is required. If the packing pressure is greater than the first preset packing pressure threshold value, it is determined that the packing is abnormal. At this time, the packing pressure is compared with the second preset packing pressure threshold value. If the packing pressure is less than the second preset packing pressure threshold value, it is determined that the packing 21 is slightly damaged. If the packing pressure is greater than the second preset packing pressure threshold value, the packing pressure is compared with the third packing pressure threshold value to continue to judge the damage state of the packing 21. If the packing pressure is less than the third preset packing pressure threshold value, it is determined that the packing 21 is moderately damaged; if the packing pressure is greater than the third preset packing pressure threshold value, it is determined that the packing 21 is severely damaged.

[0095] Comparing the packing pressure with each preset packing pressure threshold level by level can not only accurately determine the abnormal level of the packing 21, facilitating subsequent corresponding processing, but also can avoid wrong judgment, missed judgment and misjudgment through multiple judgments (first compare with the packing pressure threshold corresponding to the low abnormal level, and when it is greater than the packing pressure threshold corresponding to the low abnormal level, compare with the packing pressure threshold corresponding to the low abnormal level until the final abnormal level is determined).

[0096] In some other embodiments, the packing pressure may also be compared step by step with preset packing pressure thresholds arranged from large to small. For example, the packing pressure may be first compared with the third preset packing pressure threshold to determine whether the packing is in a serious damage state. If so, it is treated first, and the seriously damaged packing is treated in time to avoid liquid leakage in the plunger pump. If not, the packing pressure is compared with the second preset packing pressure threshold until the final state of the packing is determined.

[0097] In some other embodiments, a plurality of preset packing pressure ranges may be directly set according to the packing abnormality level, and the packing pressure range in which the packing pressure is located may be determined, thereby directly determining the packing state, thereby improving the packing state detection efficiency.

[0098] For example, if the packing pressure is in the first packing pressure range, the packing is determined to be normal; if the packing pressure is in the second packing pressure range, the packing is determined to be slightly damaged; if the packing pressure is in the third packing pressure range, the packing is determined to be moderately damaged; if the packing pressure is in the fourth packing pressure range, the packing is determined to be seriously damaged.

[0099] In some embodiments, before determining whether the discharge pressure reaches the packing sealing aid pressure in step S102, the method further includes:

[0100] S201: Determine whether the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box 1 are stable;

[0101] Further, in step S102, judging whether the discharge pressure reaches the packing auxiliary sealing pressure includes:

[0102] S1021: If the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box 1 are stable, determine the operating condition of the plunger pump according to the operating state of the plunger pump;

[0103] S1022: Under the operating condition, determine whether the discharge pressure reaches the packing auxiliary sealing pressure.

[0104] Before determining whether the discharge pressure reaches the packing-assisted sealing pressure, first determine the operating status of the plunger pump and whether the discharge pressure of the hydraulic end valve box 1 is stable. When it is determined that the operating status of the plunger pump and the discharge pressure of the hydraulic end valve box are stable, compare the discharge pressure with the packing-assisted sealing pressure. This can eliminate sudden discharge pressure changes caused by sudden changes in the operation of the plunger pump due to sudden environmental changes, and obtain a more accurate discharge pressure judgment result.

[0105] The discharge pressure of the hydraulic end valve box 1 of the plunger pump is different under different operating conditions. Therefore, after determining that the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box 1 are stable, the current operating condition of the plunger pump is determined according to the operating state of the plunger pump, and it is determined whether the discharge pressure reaches the packing auxiliary sealing pressure under the current operating condition. That is, different packing auxiliary sealing pressures can be set according to different operating conditions of the plunger pump to judge the discharge pressure of the hydraulic end valve box 1, and obtain a more accurate discharge pressure judgment result.

[0106] In some embodiments, in step S201, determining whether the operating state of the plunger pump is stable includes:

[0107] S2011: obtaining the operating status information of the plunger pump through an operating detector arranged at one end of the plunger pump crankshaft 4;

[0108] S2012: Determine whether the plunger pump is running stably based on the operating status information.

[0109] The operation status information of the plunger pump includes at least one of the operation speed of the plunger pump, the crankshaft position information of the plunger pump and the plunger position information. The plunger position information refers to the position information of each plunger when the plunger of each cylinder of the hydraulic end valve box 1 moves.

[0110] Optionally, the operation detector is an even-tooth code disk, or the operation detector is a tooth-missing code disk 8 and a key phase sensor 9.

[0111] There are multiple teeth evenly distributed on the even-tooth code disk, and the even-tooth code disk can be used to directly calculate the crankshaft speed of the plunger pump.

[0112] like Figure 1 and Figure 8 As shown, the toothless code disc 8 and the key phase sensor 9 can be installed at the free end of the piston pump crankshaft 4. There are multiple teeth evenly distributed on the toothless code disc 8, but one or more teeth are missing at a specific position, that is, "missing teeth". The toothless code disc 8 is installed on the crankshaft 4 of the piston pump, and is used to generate a first pulse signal related to the crankshaft angle position. When the crankshaft 4 rotates, the key phase sensor 9 detects the passage of the key phase and generates a second pulse signal. The second pulse signal is used to combine with the first pulse signal of the toothless code disc 8, and determine the movement position of each crank of the piston pump crankshaft and the plunger action of each cylinder of the valve box at the current moment through the crankshaft rotation angle, and then calculate the crankshaft speed of the piston pump.

[0113] In this embodiment, the toothless code disk 8 and the key phase sensor 9 cooperate to calculate the plunger action (plunger position) of each cylinder in the valve box at the current moment, and can also be used to determine the currently working cylinder 6 when the packing pressure of the packing cavity 2 is detected using the above-mentioned pressure connector 52, pressure aggregation module 53 and first pressure sensor 51. This can reduce the number of detection elements, eliminate the need for an additional cylinder 6 working detector, and ensure the accuracy of the detection results.

[0114] The even-toothed encoder is suitable for the solution in which a first pressure sensor 51 is provided at each of the above-mentioned disc root cavities 2 (each first pressure sensor 51 corresponds to each disc root cavity 2 one by one), which can reduce the detection elements and the crankshaft speed calculation steps, thereby improving the crankshaft speed calculation efficiency.

[0115] After calculating the crankshaft speed of the plunger pump, the crankshaft speed of the plunger pump is used as the operating speed of the plunger pump, and whether the plunger pump is running stably is determined based on the crankshaft speed of the plunger pump.

[0116] If the crankshaft speed of the plunger pump fluctuates within the preset speed fluctuation range (±x), it is determined that the plunger pump is running stably. Similarly, when judging whether the discharge pressure of the hydraulic end valve box 1 is stable, it can be judged whether the discharge pressure of the hydraulic end valve box 1 fluctuates within the preset discharge pressure fluctuation range (±y).

[0117] In the above embodiment, the crankshaft speed of the plunger pump is obtained by using a code disc, and the detection is accurate and reliable. The code disc can automatically adapt to the working environment of the plunger pump to obtain more accurate operating status information of the plunger pump, and the code disc is convenient to arrange. In a specific implementation, the crankshaft speed of the plunger pump can be obtained by other speed detectors such as a speed sensor set on the crankshaft 4.

[0118] In the above embodiment, whether the plunger pump is running stably is determined based on the crankshaft speed of the plunger pump. In other embodiments, whether the plunger pump is running stably can be determined directly based on the position information of each crankshaft turn or the plunger position information.

[0119] In some embodiments, the method further comprises:

[0120] S301: Generate corresponding alarm prompt information according to the abnormal state of the packing 21;

[0121] The alarm prompt information includes at least one of a cylinder with packing abnormality, abnormality level information, and abnormality handling information.

[0122] After determining that the packing is abnormal and the specific abnormality level, the corresponding alarm prompt information can be generated to prompt the operator to handle it in time to prevent sudden failure and shutdown, etc., and avoid safety accidents. The alarm prompt information can be output through output devices such as indicator lights, buzzers, voice players, and displays. When the packing is in a normal state, no prompt is required, or corresponding prompt information can be generated. For example, the color of the indicator light can indicate the abnormality level of the packing. Red indicates severe damage, orange indicates moderate damage, yellow indicates mild damage, and green indicates that the packing is normal.

[0123] The abnormality handling information is the abnormality handling plan of the packing, including stopping the action of the abnormal plunger, stopping the entire plunger pump, etc., so that users can handle the packing that is or may be damaged in time according to the alarm prompt information, especially for novice operators, so as to facilitate them to handle the packing abnormality. The alarm prompt information can also be other prompt information, for example, the specific damage thickness of the packing, etc.

[0124] The following is a detailed description of the method for monitoring the packing status of the plunger pump in conjunction with the specific working process of the plunger pump.

[0125] Embodiment 1

[0126] like Figure 6 and Fig. 9As shown, a first pressure sensor 51 is installed at the position of the first hard disk root V-shaped lip and the second hard disk root V-shaped lip of the packing 21 on each packing cavity 2 of the hydraulic end of the plunger pump (hydraulic end valve box 1) to obtain the packing pressure of each packing cavity 2 of the hydraulic end; a second pressure sensor 7 is installed on the flange side of the discharge end of the hydraulic end valve box 1 to obtain the discharge pressure of the hydraulic end valve box 1 or read the discharge pressure of the hydraulic end valve box 1 through the equipment end to determine whether the discharge pressure of the hydraulic end valve box 1 reaches the packing auxiliary sealing pressure of the plunger pump. If the discharge pressure does not reach the packing auxiliary sealing pressure, no warning threshold comparison is performed. If the discharge pressure reaches the packing auxiliary sealing pressure, it is analyzed and determined whether the current packing pressure value exceeds the packing warning threshold. If it does not exceed, it is determined that the packing is normal and the normal state is recorded. Result output; if the packing pressure exceeds the warning threshold, the hydraulic end cylinder number n corresponding to the abnormal packing pressure is determined by the mark of the first pressure sensor 51 installed above each packing cavity 2 of the hydraulic end, and the packing pressure is further determined to be greater than the moderate threshold. If the packing pressure does not exceed the moderate threshold, it is determined that the packing of cylinder n is slightly damaged, and the alarm prompt information of "n cylinder packing is slightly damaged" is output; if the packing pressure exceeds the moderate threshold, it is further determined whether the packing pressure exceeds the severe threshold. If the packing pressure does not exceed the severe threshold, it is determined that the packing of cylinder n is moderately damaged, and the alarm prompt information of "n cylinder packing is moderately damaged" is output; if the packing pressure exceeds the severe threshold, it is determined that the packing of cylinder n is severely damaged, and the alarm prompt information of "n cylinder packing is severely damaged" is output. On-site operators can handle the above different alarm prompt information in a timely manner to prevent sudden failure shutdowns, etc.

[0127] Embodiment 2

[0128] like Figure 1 , Figures 7 to 9 As shown, the difference between the second embodiment and the first embodiment is that: a toothless code disk 8 and a key phase sensor 9 are installed at one end of the plunger pump crankshaft 4 to obtain the plunger action of each cylinder of the valve box of the plunger pump at the current moment. A pressure connector 52 is installed at the position of the first hard disk root V-shaped lip and the second hard disk root V-shaped lip of the packing 21 on each packing cavity 2 of the hydraulic end of the plunger pump. The pressure connectors 52 of each cylinder are summarized to the pressure summary module 53. The first pressure sensor 51 is installed on the pressure summary module 53. Combined with the plunger action of each cylinder of the valve box at the current moment obtained by the toothless code disk 8 and the key phase sensor 9, the packing pressure of each packing cavity 2 of the hydraulic end is obtained.

[0129] Embodiment 3

[0130] like Figure 6 and Fig.10As shown, an even-toothed encoder is installed at one end of the piston pump crankshaft 4 to obtain the crankshaft speed of the piston pump. A packing first pressure sensor 51 is installed at the position of the first hard disk root V-shaped lip and the second hard disk root V-shaped lip of the packing 21 above each packing cavity 2 of the hydraulic end valve box 1 to obtain the packing pressure of each packing cavity 2 of the hydraulic end; a second pressure sensor 7 is installed on the flange side of the discharge end of the hydraulic end valve box 1 to obtain the discharge pressure of the hydraulic end valve box 1 or read the discharge pressure of the hydraulic end valve box 1 through the equipment end; determine whether the speed and discharge pressure of the piston pump are stable. If stable, read the discharge pressure of the piston pump, and determine whether the discharge pressure of the piston pump reaches the packing auxiliary sealing pressure of the piston pump under the current operating condition of the piston pump in combination with the current speed of the piston pump. If the discharge pressure does not reach the packing auxiliary sealing pressure, no warning threshold comparison is performed. If the discharge pressure reaches the packing auxiliary sealing pressure, analyze and determine whether the current packing pressure value exceeds the packing warning threshold. If it does not exceed, the packing is determined to be normal, and the normal state result is output; if the packing pressure exceeds the warning threshold, the hydraulic end cylinder number n corresponding to the abnormal packing pressure is determined by the mark of the first pressure sensor 51 installed above each packing cavity 2 of the hydraulic end, and the packing pressure is further determined to exceed the moderate threshold. If the packing pressure does not exceed the moderate threshold, it is determined that the packing of cylinder n is slightly damaged, and the alarm prompt information of "n cylinder packing is slightly damaged" is output; if the packing pressure exceeds the moderate threshold, it is further determined whether the packing pressure exceeds the severe threshold. If the packing pressure does not exceed the severe threshold, it is determined that the packing of cylinder n is moderately damaged, and the alarm prompt information of "n cylinder packing is moderately damaged" is output; if the packing pressure exceeds the severe threshold, it is determined that the packing of cylinder n is severely damaged, and the alarm prompt information of "n cylinder packing is severely damaged" is output. The on-site operator can handle the above different alarm prompt information in a timely manner to prevent sudden failure shutdown, etc.

[0131] The difference between the third embodiment and the first embodiment is that: the operation state of the plunger pump and the step of judging whether the discharge pressure of the hydraulic end valve box 1 is stable are added, so as to accurately identify and judge the packing state according to the current operation condition of the plunger pump. In the third embodiment, whether the operation state of the plunger pump is stable is judged according to the crankshaft speed of the plunger pump obtained by the uniform tooth code disk.

[0132] Embodiment 4

[0133] like Figure 1 , Figure 7 , Figure 8 and Fig.10 As shown, the difference between the fourth embodiment and the second embodiment is that: a step of judging the operating state of the plunger pump and whether the discharge pressure of the hydraulic end valve box 1 is stable is added, so as to accurately identify and judge the packing state according to the current operating condition of the plunger pump.

[0134] In the fourth embodiment, the toothless encoder 8 and the key phase sensor 9 in the second embodiment are used to obtain the movement position of each crankshaft of the plunger pump and the plunger action of each cylinder of the valve box at the current moment, and then calculate the crankshaft speed of the plunger pump.

[0135] Fig.11 FIG. 1 is a schematic diagram showing a structure of a plunger pump packing condition monitoring device according to an embodiment of the present disclosure. Fig.11 As shown, based on the above-mentioned plunger pump packing state monitoring method, the embodiment of the present disclosure provides a plunger pump packing state monitoring device, including:

[0136] The first acquisition module 10 is configured to acquire the packing pressure of each packing cavity through a packing pressure detector installed at the packing cavity on the hydraulic end valve box of the plunger pump;

[0137] A second acquisition module 20 is configured to acquire the discharge pressure of the hydraulic end valve box;

[0138] The monitoring module 30 is configured to monitor the packing status of the plunger pump according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity.

[0139] In some embodiments, the packing cavity includes the contact position between the hydraulic end valve box and the packing, the contact position between the hydraulic end valve box and the packing pressure cap, the contact position between the hydraulic end valve box and the packing pressure ring, and the contact position between the hydraulic end valve box and the packing spacer ring.

[0140] In some embodiments, a first pressure sensor is installed on each packing cavity, and the first acquisition module 10 is further configured to acquire the packing pressure of the corresponding packing cavity through the first pressure sensor disposed at each packing cavity.

[0141] In some embodiments, a first pressure connector is installed on each packing cavity, each of the first pressure connectors is connected to a pressure aggregation module, and a first pressure sensor is provided on the pressure aggregation module.

[0142] The first acquisition module 10 is further configured to: acquire the pressure of the pressure summary module through the first pressure sensor, wherein the cylinders of the hydraulic end valve box work alternately, and the pressure of the pressure summary module is the packing pressure of the packing cavity of the current working cylinder;

[0143] The packing pressure of each packing cavity is determined according to the pressure of the pressure summarizing module.

[0144] In some embodiments, the monitoring module 30 includes:

[0145] A first judgment module is configured to judge whether the discharge pressure reaches the packing auxiliary sealing pressure;

[0146] A second judgment module is configured to judge whether the packing pressure exceeds a preset packing pressure threshold if the discharge pressure reaches the packing auxiliary sealing pressure;

[0147] The third judgment module is configured to determine that the packing is abnormal if the packing pressure exceeds the preset packing pressure threshold.

[0148] In some embodiments, the preset packing pressure threshold includes multiple thresholds determined according to the packing abnormality level, and the monitoring module 30 is further configured as follows:

[0149] The packing pressure is compared with preset packing pressure thresholds arranged from small to large step by step to determine the state of the packing.

[0150] In some embodiments, the monitoring module 30 further includes a fourth judgment module configured to judge whether the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable before judging whether the discharge pressure reaches the packing auxiliary sealing pressure;

[0151] The first judgment module is further configured as follows:

[0152] If the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable, the operating condition of the plunger pump is determined according to the operating state of the plunger pump;

[0153] Under the operating conditions, it is determined whether the discharge pressure reaches the packing auxiliary sealing pressure.

[0154] In some embodiments, the fourth determination module is further configured to:

[0155] The operating status information of the plunger pump is obtained by means of an operating detector arranged at one end of the crankshaft of the plunger pump, wherein the operating status information of the plunger pump includes at least one of the operating speed of the plunger pump, the crankshaft position information of the plunger pump and the plunger position information, and the operating detector is an even-tooth code disk, or the operating detector is a toothless code disk and a key phase sensor to determine whether the plunger pump is operating stably based on the operating status information.

[0156] In some embodiments, the plunger pump packing condition monitoring device further includes an alarm prompt module configured to:

[0157] According to the abnormal state of the packing, a corresponding alarm prompt message is generated;

[0158] The alarm prompt information includes at least one of a cylinder with packing abnormality, abnormality level information, and abnormality handling information.

[0159] The plunger pump packing state monitoring device provided in the embodiment of the present disclosure corresponds to the plunger pump packing state monitoring method of the above embodiment. Any optional items in the plunger pump packing state monitoring method embodiment are also applicable to the embodiment of the plunger pump packing state monitoring device, which will not be repeated here.

[0160] An embodiment of the present disclosure further provides an electronic device, comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the above-mentioned method for monitoring the state of a piston pump packing when executing the computer program on the memory.

[0161] The above-mentioned electronic equipment is mainly used to analyze and transmit the measurement data detected by the quantum detector to obtain accurate gas absorption rate.

[0162] In some embodiments, the processor executing the computer program may be a processing device including one or more general-purpose processing devices, such as a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), etc. More specifically, the processor may be a complex instruction set computing (CISC) microprocessor, a reduced instruction set computing (RISC) microprocessor, a very long instruction word (VLIW) microprocessor, a processor running other instruction sets, or a processor running a combination of instruction sets. The processor may also be one or more special-purpose processing devices, such as an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a digital signal processor (DSP), a system on a chip (SoC), etc.

[0163] The memory may be a read-only memory (ROM), a random access memory (RAM), a phase-change random access memory (PRAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), an electrically erasable programmable read-only memory (EEPROM), other types of random access memory (RAM), a flash disk or other form of flash memory, a cache, a register, a static memory, a compact disk read-only memory (CD-ROM), a digital versatile disk (DVD) or other optical storage, a cassette or other magnetic storage device, or any other possible non-temporary medium used to store information or instructions that can be accessed by a computer device.

[0164] The electronic devices of the embodiments of the present disclosure may include but are not limited to fixed terminal devices such as servers, desktop computers, digital TVs, etc., and mobile terminal devices such as vehicle-mounted devices (such as head-up display devices), handheld devices (such as mobile phones, tablet computers, etc.), wearable devices (such as smart watches, smart bracelets, etc.), etc.

[0165] The embodiment of the present disclosure further provides a computer-readable storage medium, wherein the computer-readable medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for monitoring the state of the packing of a plunger pump is implemented.

[0166] The computer-readable storage medium of the embodiments of the present disclosure may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. In the embodiments of the present disclosure, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device, for example, the above-mentioned memory.

[0167] The computer programs of the embodiments of the present disclosure may be organized into one or more computer executable components or modules. Any number and combination of such components or modules may be used to implement the various aspects of the present disclosure. For example, the various aspects of the present disclosure are not limited to the specific computer executable instructions or specific components or modules shown in the drawings and described herein. Other embodiments may include different computer executable instructions or components with more or less functions than those shown and described herein.

[0168] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

Claims

1. A method for monitoring the state of a plunger pump packing, characterized in that: include: The packing pressure of each packing cavity is obtained by installing a packing pressure detector at the packing cavity on the hydraulic end valve box of the plunger pump; Obtaining the discharge pressure of the hydraulic end valve box; The packing state of the plunger pump is monitored according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity.

2. The method according to claim 1, characterized in that The packing cavity includes the contact position between the hydraulic end valve box and the packing, the contact position between the hydraulic end valve box and the packing pressure cap, the contact position between the hydraulic end valve box and the packing pressure ring, and the contact position between the hydraulic end valve box and the packing spacer ring.

3. The method according to claim 1, characterized in that A first pressure sensor is installed on each packing cavity, and the packing pressure of each packing cavity is obtained through a packing pressure detector, including: The packing pressure of the corresponding packing cavity is obtained by means of a first pressure sensor arranged at each packing cavity.

4. The method according to claim 1, characterized in that: A first pressure connector is installed on each packing cavity, each of which is connected to a pressure aggregation module, and a first pressure sensor is installed on the pressure aggregation module. The packing pressure detector is used to obtain the packing pressure of each packing cavity, including: The pressure of the pressure summarizing module is obtained by the first pressure sensor, wherein the cylinders of the hydraulic end valve box work alternately, and the pressure of the pressure summarizing module is the packing pressure of the packing cavity of the current working cylinder; The packing pressure of each packing cavity is determined according to the pressure of the pressure summarizing module.

5. The method according to claim 1, characterized in that The packing state of the plunger pump is monitored according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity, including: Determine whether the discharge pressure reaches the packing auxiliary sealing pressure; If so, determining whether the packing pressure exceeds a preset packing pressure threshold; If the packing pressure exceeds the preset packing pressure threshold, it is determined that the packing is abnormal.

6. The method according to claim 5, characterized in that The preset packing pressure threshold includes multiple thresholds determined according to the packing abnormality level, and judging whether the packing pressure exceeds the preset packing pressure threshold includes: The packing pressure is compared with preset packing pressure thresholds arranged from small to large step by step to determine the state of the packing.

7. The method according to claim 5, characterized in that Before determining whether the discharge pressure reaches the packing auxiliary sealing pressure, the method further includes: Determining whether the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable; Determining whether the discharge pressure reaches the packing sealing pressure includes: If the operating state of the plunger pump and the discharge pressure of the hydraulic end valve box are stable, the operating condition of the plunger pump is determined according to the operating state of the plunger pump; Under the operating conditions, it is determined whether the discharge pressure reaches the packing auxiliary sealing pressure.

8. The method according to claim 7, characterized in that Determining whether the operating state of the plunger pump is stable includes: The operation status information of the plunger pump is obtained by an operation detector arranged at one end of the crankshaft of the plunger pump, wherein the operation status information of the plunger pump includes at least one of the operation speed of the plunger pump, the crankshaft position information of the plunger pump and the plunger position information, and the operation detector is an even-toothed code disk, or the operation detector is a toothless code disk and a key phase sensor; Whether the plunger pump is running stably is determined according to the running status information.

9. The method according to claim 5, characterized in that The method further comprises: According to the abnormal state of the packing, a corresponding alarm prompt message is generated; The alarm prompt information includes at least one of a cylinder with packing abnormality, abnormality level information, and abnormality handling information.

10. A plunger pump packing condition monitoring device, characterized in that: include: A first acquisition module is configured to acquire the packing pressure of each packing cavity through a packing pressure detector installed at the packing cavity on the hydraulic end valve box of the plunger pump; A second acquisition module is configured to acquire the discharge pressure of the hydraulic end valve box; The monitoring module is configured to monitor the packing state of the plunger pump according to the discharge pressure of the hydraulic end valve box and the packing pressure of each packing cavity.

Images