Connecting rod device of plunger pump and plunger pump

Abstract

The invention discloses a connecting rod device of a plunger pump and the plunger pump, and relates to the field of oil and gas equipment. A connecting rod device of a plunger pump comprises a connecting rod, a bearing bush and a monitoring assembly. A first mounting hole and a second mounting hole are formed in the end part of the connecting rod, the bearing bush is arranged in the first mounting hole, and the second mounting hole is positioned in the hole wall of the first mounting hole and is communicated with the first mounting hole; the monitoring assembly comprises a data acquisition module and an information receiving module which are electrically connected, the data acquisition module is arranged at the end part of the connecting rod, the data acquisition module comprises a temperature acquisition element, and the temperature acquisition element is arranged in the second mounting hole, is arranged opposite to the bearing bush and is used for monitoring the temperature of the bearing bush. The problem that the bearing bush is burnt due to too high temperature can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil and gas equipment, and specifically relates to a connecting rod device of a plunger pump and a plunger pump. Background Art

[0002] In recent years, with the development of oil and gas equipment and the increasing difficulty of oil and gas extraction, the working pressure of the fracturing plunger pump has become higher and higher, and the rod load of the connecting rod has increased accordingly. If the processing accuracy, assembly process, lubricating oil, and other on-site use conditions are not appropriate, it is easy to cause the bearing temperature to be too high and burn the bearing. In severe cases, it may cause the crankshaft to seize and burn, resulting in huge losses. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a connecting rod device of a plunger pump and a plunger pump, which can solve the problem of bearing bush burning caused by excessively high bearing bush temperature.

[0004] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides a connecting rod device for a plunger pump, comprising: a connecting rod, a bearing bush, and a monitoring assembly; The end of the connecting rod is provided with a first mounting hole and a second mounting hole, the bearing bush is arranged in the first mounting hole, and the second mounting hole is located on the hole wall of the first mounting hole and is connected to the first mounting hole; The monitoring component includes an electrically connected data acquisition module and an information receiving module. The data acquisition module is arranged at the end of the connecting rod. The data acquisition module includes a temperature acquisition element. The temperature acquisition element is arranged in the second mounting hole and is arranged opposite to the bearing shell for monitoring the temperature of the bearing shell.

[0005] An embodiment of the present application also provides a plunger pump, comprising the above-mentioned connecting rod device.

[0006] In the embodiment of the present application, the temperature of the bearing can be monitored in real time through the temperature acquisition element, and the collected temperature information is sent to the information receiving module, so as to obtain the temperature condition of the bearing in real time, so that the abnormality of the bearing can be discovered in time, so that the abnormality will not develop and spread further, thereby effectively preventing the bearing temperature from being too high and causing the bearing to burn, and can also effectively avoid damage such as crankshaft seizure and burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of a monitoring component disclosed in an embodiment of the present application; Figure 2 This is a schematic structural diagram of the data acquisition module, connecting rod and bearing disclosed in the embodiment of the present application; Figure 3A partial schematic diagram of the data acquisition module, connecting rod, and bearing shell disclosed in the embodiments of the present application; Figure 4 A schematic diagram of the temperature monitoring principle disclosed in the embodiments of the present application.

[0008] Explanation of reference numerals: 10 - Connecting rod; 11 - First mounting hole; 12 - Second mounting hole; 20 - Bearing shell; 30 - Monitoring component; 31 - Data acquisition module; 311 - Temperature acquisition element; 312 - Vibration acquisition element; 313 - Housing; 3131 - Non - metallic shell; 3132 - Metal base plate; 314 - Circuit board; 315 - Battery; 316 - Antenna; 317 - Elastic member; 32 - Information receiving module; 33 - Data display and analysis module. Specific embodiments

[0009] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0010] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0011] Next, the embodiments of the present application will be described in detail with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0012] Refer to Figures 1 to 4 , the embodiments of the present application disclose a connecting rod device of a plunger pump. The disclosed connecting rod device includes a connecting rod 10, a bearing shell 20, and a monitoring component 30.

[0013] Among them, the end of the connecting rod 10 may be provided with a first mounting hole 11, and the bearing bush 20 is arranged in the first mounting hole 11 to be connected with a rotating shaft (or other rotating structural members) through the bearing bush 20, so as to ensure the smoothness of rotation and ensure wear resistance. Optionally, one end of the connecting rod 10 may be provided with a first mounting hole 11, or both ends of the connecting rod 10 are respectively provided with a first mounting hole 11, and the bearing bush 20 can be installed in each first mounting hole 11. Exemplarily, the outer wall of the bearing bush 20 and the hole wall of the first mounting hole 11 may be connected by an interference fit or a transition fit, which can not only ensure the rotation of the bearing bush 20 in the first mounting hole 11, but also ensure the installation stability of the bearing bush 20.

[0014] At least part of the monitoring component 30 is arranged at the end of the connecting rod 10 and is used for real-time monitoring of the conditions of the connecting rod 10 and the bearing bush 20 to ensure the normal use of the connecting rod 10 and the bearing bush 20. In some embodiments, the monitoring component 30 may include a data acquisition module 31 and an information receiving module 32. The data acquisition module 31 is arranged at the end of the connecting rod 10 and is electrically connected to the information receiving module 32, so as to detect the conditions of the end of the connecting rod 10 and the bearing bush 20 through the data acquisition module 31 and send the monitored information to the information receiving module 32 for subsequent analysis and processing of the information.

[0015] Considering that during the operation of the plunger pump, due to factors such as insufficient lubrication, loose components, foreign objects, and overload, abnormal friction may occur between components, resulting in an increase in the temperature of the bearing bush 20 or large temperature fluctuations. Therefore, the temperature of the bearing bush 20 can be monitored to quickly detect abnormal conditions of the bearing bush 20, thereby ensuring the reliability of the operation of the bearing bush 20. Specifically, the data acquisition module 31 may include a temperature acquisition element 311 to monitor the temperature of the bearing bush 20 in real time through the temperature acquisition element 311.

[0016] To realize the installation of the temperature acquisition element 311, the end of the connecting rod 10 may also be provided with a second mounting hole 12, which is located on the hole wall of the first mounting hole 11 and communicates with the first mounting hole 11; the temperature acquisition element 311 is arranged in the second mounting hole 12 and is oppositely arranged with the bearing bush 20 for monitoring the temperature of the bearing bush 20.

[0017] In the embodiment of the present application, the temperature of the bearing bush 20 can be monitored in real time through the temperature acquisition element 311, and the acquired temperature information is sent to the information receiving module 32, so as to obtain the temperature condition of the bearing bush 20 in real time, thereby the abnormality of the bearing bush 20 can be detected in time, preventing the abnormality from further developing and spreading, and effectively preventing the occurrence of the situation of the bearing bush 20 being burned due to overheating, and effectively avoiding damage situations such as crankshaft seizure and burning.

[0018] To implement the analysis and processing of data, the monitoring component 30 may further include a data display and analysis module 33, which is electrically connected to the information receiving module 32. In this way, the relevant information of the end of the connecting rod 10 and the bearing bush 20 collected by the data acquisition module 31 is first sent to the information receiving module 32, and then forwarded by the information receiving module 32 to the data display and analysis module 33, and analyzed and processed by the data display and analysis module 33, and the corresponding analysis and processing results are displayed for the operator to view. Optionally, the data display and analysis module 33 may be a PC. Of course, it may also be other devices, which are not specifically limited here.

[0019] It should be noted here that the data display and analysis module 33 can play a reminder role for the operator. Of course, the data display and analysis module 33 may also have an alarm function to emit an alarm sound when the connecting rod 10 and the bearing bush 20 are abnormal.

[0020] In some embodiments, when the temperature parameter collected by the temperature acquisition element 311 exceeds the temperature threshold, the data display and analysis module 33 issues an alarm message, thereby reminding the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling.

[0021] In other embodiments, when the operating condition of the connecting rod device remains unchanged and the temperature curve corresponding to the temperature parameter collected by the temperature acquisition element 311 shows abnormal fluctuations, the data display and analysis module 33 issues an alarm message, thereby reminding the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling. It should be noted here that when the operating condition of the connecting rod device remains unchanged, the temperature of the bearing bush 20 should theoretically be relatively stable, that is, fluctuate within a small range. When the temperature of the bearing bush 20 fluctuates greatly, it will cause the temperature curve to be abnormal, indicating that there is a risk of excessive temperature of the bearing bush 20. At this time, the operator can be reminded to make corresponding handling to reduce the risk brought by the excessive temperature of the bearing bush 20.

[0022] In still other embodiments, when the temperature difference between the temperature parameters collected by the temperature acquisition elements 311 corresponding to the multiple cylinders of the piston pump is greater than the preset difference, the data display and analysis module 33 issues an alarm message, thereby reminding the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling.

[0023] Optionally, the piston pump may have multiple cylinders, such as a five-cylinder piston pump, etc. Each cylinder corresponds to a connecting rod 10, and a temperature acquisition element 311 is provided at the end of each connecting rod 10 to monitor the temperature of the bearing bush 20 at the end of the connecting rod 10 in real time through the temperature acquisition element 311.

[0024] Under normal circumstances, the temperature difference between the temperature acquisition elements 311 corresponding to multiple cylinder blocks will not exceed a preset difference, such as 5°C, etc. When the temperature difference between the temperature acquisition elements 311 corresponding to any two cylinder blocks exceeds the preset difference, it indicates that the temperature of the bearing bush 20 corresponding to at least one of the two cylinder blocks is abnormal. At this time, the staff needs to be reminded to make timely handling to prevent situations such as the bearing bush 20 overheating and burning out.

[0025] To achieve information transmission, the data acquisition module 31 and the information receiving module 32 can be connected wirelessly to achieve information transmission wirelessly and prevent the situation of cable crossing and entanglement; of course, the data acquisition module 31 and the information receiving module 32 can also be connected by wire to achieve information transmission through cables (such as network cables, etc.).

[0026] In addition, the information receiving module 32 and the data display and analysis module 33 can be connected wirelessly to achieve delicate transmission wirelessly and prevent the situation of cable crossing and entanglement; of course, the information receiving module 32 and the data display and analysis module 33 can also be connected by wire to achieve information transmission through cables (such as network cables, etc.).

[0027] In some more specific embodiments, such as Figure 1 As shown, the plunger pump can have five cylinder blocks, and temperature acquisition elements 311 are respectively provided at the end parts of the connecting rods 10 corresponding to each cylinder block to collect the temperature of the bearing bushes at the end parts of the connecting rods 10 corresponding to the five cylinder blocks through the temperature acquisition elements 311.

[0028] The temperature information collected by each temperature acquisition element 311 can be transmitted to the information receiving module 32 through wireless transmission, and transmitted to the data display and analysis module 33 through the information receiving module 32 wirelessly or by wire to facilitate fault judgment and actions.

[0029] Refer to Figure 3 In some embodiments, the data acquisition module 31 may further include a vibration acquisition element 312, which is provided at the end of the connecting rod 10 and is used to monitor the vibration parameters of the connecting rod device. It should be noted here that during the operation of the plunger pump, the connecting rod 10 moves back and forth, and vibrations will be generated during the movement. Therefore, by monitoring the vibration parameters of the connecting rod 10 through the vibration acquisition element 312, it can be determined whether the connecting rod device is in an operating state, which can lay a foundation for subsequent switching of the operating mode of the data acquisition module 31.

[0030] The data acquisition module 31 can have a vibration wake-up mode and a long-duration operation mode. In the vibration wake-up mode, when the vibration parameters collected by the vibration acquisition element 312 do not exceed the vibration threshold, indicating that the plunger pump is in a shutdown state, the data acquisition module 31 switches to a sleep state, thereby saving energy and extending the service life of components.

[0031] When the vibration parameter collected by the vibration collection element 312 exceeds the vibration threshold, it indicates that the plunger pump is in operation. At this time, the data collection module 31 switches to the working state to monitor the end of the connecting rod 10 and the bearing 20.

[0032] Of course, the data acquisition module 31 may also have a long working mode. In the long working mode, the data acquisition module 31 is in a continuous working state.

[0033] Based on the above settings, the data acquisition module 31 in the embodiment of the present application can switch freely between vibration wake-up mode and long working mode. Not only that, the data acquisition module 31 can also switch to the long working mode, so that the data acquisition module 31 is always in working state, which is convenient for diagnosing whether the data acquisition module 31 has abnormalities.

[0034] Continue to refer Figure 3 In some embodiments, the data acquisition module 31 may further include a housing 313, a circuit board 314, a battery 315, and an antenna 316. The housing 313 is a basic component that provides space for the circuit board 314, the battery 315, the antenna 316, and the like. It also provides some protection for the circuit board 314, the battery 315, the antenna 316, and the vibration collection element 312. This makes the data acquisition module 31 in the present embodiment more compact and easier to install.

[0035] The housing 313 is disposed at the end of the connecting rod 10. For example, the housing 313 and the end of the connecting rod 10 may be connected by screwing, riveting, bonding, or snapping, as long as the data acquisition module 31 will not fall during operation of the plunger pump. The temperature acquisition element 311 may be disposed within the housing 313. The battery 315, temperature acquisition element 311, antenna 316, and vibration acquisition element 312 are all electrically connected to the circuit board 314. The antenna 316 is wirelessly connected to the information receiving module 32.

[0036] Optionally, the battery 315 , the antenna 316 and the vibration collection element 312 may all be disposed on the circuit board 314 to achieve signal transmission.

[0037] Optionally, the housing 313 may include a non-metallic housing 3131 and a metal bottom plate 3132. The metal bottom plate 3132 is fixedly connected to the end of the connecting rod 10 through fasteners to ensure the firmness and stability of the connection. The non-metallic part is fastened to the metal bottom plate 3132 to enclose a receiving space, and the circuit board 314, the battery 315, the antenna 316, etc. are all arranged in the receiving space to prevent external interference from affecting the normal operation of the circuit board 314, the battery 315, and the antenna 316.

[0038] Exemplarily, the material of the non-metallic housing 3131 may be engineering plastic, such as PA66 or PA66 with glass fiber, etc.; the metal bottom plate 3132 may be a steel plate, etc. Of course, the non-metallic housing 3131 and the metal bottom plate 3132 may also be made of other materials respectively, which are not specifically limited herein. Based on this setting, it can not only ensure that the non-metallic housing 3131 has sufficient mechanical properties, but also reduce the signal shielding effect and ensure the normal transmission of signals; the metal bottom plate 3132 has high strength to ensure the reliability of the installation of fasteners.

[0039] Continuing to refer to Figure 3 , in some embodiments, the data acquisition module 31 may further include an elastic member 317. The elastic member 317 is arranged in the second mounting hole 12 and elastically connects the housing 313 and the temperature acquisition element 311. Under the elastic force of the elastic member 317, the temperature acquisition element 311 will not move randomly in the second mounting hole 12, ensuring the stability of the temperature acquisition element 311 and preventing the temperature acquisition element 311 from being damaged due to collision during movement in the second mounting hole 12; moreover, it can also ensure that the temperature acquisition element 311 is always close to the bearing bush 20, ensuring the accuracy of the temperature monitoring of the bearing bush 20.

[0040] Optionally, the elastic member 317 may be a spring.

[0041] In some embodiments, the connecting rod 10 may include a large end and a small end arranged opposite to each other. The large end may be connected to the crankshaft of the piston pump, and the small end may be connected to the piston. Moreover, first mounting holes 11 are provided at both the large end and the small end of the connecting rod 10, and bearing bushes 20 are respectively arranged in the respective first mounting holes 11. The detection assembly is arranged at at least one of the large end and the small end for monitoring the temperature of the bearing bush 20 at at least one of them, effectively preventing the situation of bearing bush burning caused by excessive temperature of the bearing bush 20.

[0042] In the embodiments of the present application, when the piston pump is running, the vibration generated by the connecting rod device excites the vibration acquisition element 312, causing the data acquisition module 31 to switch to the working state, so as to collect the temperature of the bearing bush 20 in real time through the temperature acquisition element 311, and transmit the collected temperature parameter signal to the circuit board 314. After being processed by the circuit board 314, the signal is wirelessly transmitted to the information receiving module 32 through the antenna 316, and the information receiving module 32 transmits it to the data display and analysis module 33 through wired or wireless means for analysis and processing to achieve real-time monitoring. Moreover, in the above process, the battery 315 provides electrical energy for the temperature acquisition element 311, the vibration acquisition element 312, the antenna 316, the circuit board 314, etc.

[0043] In some embodiments, the connecting rod 10 may include a first arc-shaped sleeve, a second arc-shaped sleeve, and a locking member. Wherein, the two ends of the first arc-shaped sleeve are respectively butted against the two ends of the second arc-shaped sleeve, and the locking member connects the two ends of the first arc-shaped sleeve and the two ends of the second arc-shaped sleeve, so that the first arc-shaped sleeve and the second arc-shaped sleeve enclose a first mounting hole 11. When the bearing bush 20 is installed in the first mounting hole 11, the outer wall of the bearing bush 20 abuts against the inner wall of the first arc-shaped sleeve and the inner wall of the second arc-shaped sleeve respectively, so as to sleeve the bearing bush 20 through the first arc-shaped sleeve and the second arc-shaped sleeve respectively, ensuring the installation stability of the bearing bush 20.

[0044] Optionally, fastening ends are respectively provided at the two ends of the first arc-shaped sleeve and the second arc-shaped sleeve, and the locking member locks the corresponding fastening ends together to ensure the firm connection between the first arc-shaped sleeve and the second arc-shaped sleeve.

[0045] In addition, an oil hole may be provided at the end of the connecting rod 10, and the oil hole communicates with the first mounting hole 11. In this way, a lubricating medium can be injected into the first mounting hole 11 through the oil hole, so as to lubricate the bearing bush 20 and the hole wall of the first mounting hole 11 through the lubricating medium, effectively alleviating the problem of wear between the bearing bush 20 and the hole wall of the first mounting hole 11.

[0046] Based on the above connecting rod device, the embodiments of the present application also disclose a piston pump, and the disclosed piston pump includes the above connecting rod device.

[0047] The embodiments of the present application can also provide a monitoring method for the connecting rod device, and the monitoring method includes: Monitoring the temperature of the bearing bush 20 through the temperature acquisition element 311 to obtain temperature monitoring information; Receiving the temperature monitoring information sent by the temperature acquisition element 311 through the information receiving module 32; Receiving the information sent by the information receiving module 32 through the data display and analysis module 33, and analyzing and processing the information; When the temperature parameter corresponding to the temperature monitoring information exceeds the temperature threshold, it is determined that the temperature of the bearing bush 20 is abnormal, so as to lay a foundation for taking corresponding measures.

[0048] Furthermore, when the temperature parameter corresponding to the temperature monitoring information exceeds the temperature threshold, the data display and analysis module 33 can send out an alarm message to remind the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling.

[0049] Optionally, when the temperature curve corresponding to the temperature parameter collected by the temperature acquisition element 311 shows abnormal fluctuations, the data display and analysis module 33 sends out an alarm message to remind the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling.

[0050] In addition, when the temperature difference between the temperature parameters collected by the temperature acquisition elements 311 corresponding to multiple cylinders of the plunger pump is greater than the preset difference value, the data display and analysis module 33 sends out an alarm message to remind the operator that the temperature of the bearing bush 20 is abnormal, so that the operator can make timely handling.

[0051] Optionally, the vibration acquisition element 312 monitors the vibration parameters of the connecting rod 10 to obtain vibration monitoring information; The information receiving module 32 receives the vibration monitoring information sent by the vibration acquisition element 312; The data display and analysis module 33 receives the information sent by the information receiving module 32 and analyzes and processes the information; When the vibration parameter collected by the vibration acquisition element 312 does not exceed the vibration threshold, the data acquisition module 31 can switch to the sleep state, so as to save energy and extend the service life of components; when the vibration parameter collected by the vibration acquisition element 312 exceeds the vibration threshold, the data acquisition module 31 can switch to the working state to monitor the situation of the end of the connecting rod 10 and the bearing bush 20.

[0052] Reference Figure 4 In this application, the temperature monitoring principle in the embodiment is as follows: The battery 315 can supply power to the temperature acquisition element 311 and the circuit board 314 respectively; the temperature acquisition element 311 can collect the bearing bush temperature and transmit it to the circuit board 314. After the circuit board 314 processes the signal, it transmits the signal to the antenna 316, and the antenna 316 transmits the signal to the information receiving module 32 through wireless transmission, and the information receiving module 32 transmits the signal to the data display and analysis module 33, so as to realize fault judgment and actions. In summary, in the connecting rod device according to the embodiments of the present application, through the mutual cooperation among the data acquisition module 31, the information receiving module 32, and the data display and analysis module 33, real-time and reliable monitoring of the operating state of the bearing shell 20 can be achieved, and it can be detected in time before or at the initial stage of the abnormality of the bearing shell 20, so as to prevent the deterioration or spread of the abnormality and ensure the safe and reliable operation of the bearing shell 20, the connecting rod device, and even the plunger pump.

[0053] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A connecting rod device of a plunger pump, characterized in that, Comprising: A connecting rod (10), a bearing shell (20) and a monitoring component (30); The end of the connecting rod (10) is provided with a first mounting hole (11) and a second mounting hole (12). The bearing shell (20) is arranged in the first mounting hole (11), and the second mounting hole (12) is located on the hole wall of the first mounting hole (11) and communicates with the first mounting hole (11); The monitoring component (30) includes a data acquisition module (31) and an information receiving module (32) which are electrically connected. The data acquisition module (31) is arranged at the end of the connecting rod (10). The data acquisition module (31) includes a temperature acquisition element (311). The temperature acquisition element (311) is arranged in the second mounting hole (12) and is arranged opposite to the bearing shell (20) for monitoring the temperature of the bearing shell (20).

2. The connecting rod device according to claim 1, characterized in that, The data acquisition module (31) further includes a vibration acquisition element (312). The vibration acquisition element (312) is arranged at the end of the connecting rod (10) for monitoring the vibration parameters of the connecting rod device.

3. The connecting rod device according to claim 2, wherein, The data acquisition module (31) has a vibration wake-up mode and a long working mode; In the vibration wake-up mode, when the vibration parameters collected by the vibration acquisition element (312) do not exceed the vibration threshold, the data acquisition module (31) switches to the sleep state. When the vibration parameters collected by the vibration acquisition element (312) exceed the vibration threshold, the data acquisition module (31) switches to the working state; In the long working mode, the data acquisition module (31) is in a continuous working state.

4. The connecting rod device according to claim 1, wherein, The monitoring component (30) further includes a data display and analysis module (33). The data display and analysis module (33) is electrically connected to the information receiving module (32); In the case where the temperature parameter collected by the temperature acquisition element (311) exceeds the temperature threshold, the data display and analysis module (33) issues an alarm message; Or, in the case where the operating condition of the connecting rod device remains unchanged and the temperature curve corresponding to the temperature parameter collected by the temperature acquisition element (311) shows abnormal fluctuations, the data display and analysis module (33) issues an alarm message; Or, in the case where the difference between the temperature parameters collected by the temperature acquisition elements (311) corresponding to multiple cylinders of the piston pump is greater than a preset difference, the data display and analysis module (33) issues an alarm message.

5. The connecting rod device according to claim 4, characterized in that, The data acquisition module (31) and the information receiving module (32) are wirelessly connected or wired connected; And / or, the information receiving module (32) and the data display and analysis module (33) are wirelessly connected or wired connected.

6. The connecting rod device according to claim 2, wherein The data acquisition module (31) further includes a housing (313), a circuit board (314), a battery (315) and an antenna (316); The housing (313) is arranged at the end of the connecting rod (10); The circuit board (314), the battery (315), the antenna (316) and the vibration acquisition element (312) are all arranged inside the housing (313), and the temperature acquisition element (311) is arranged outside the housing (313). The battery (315), the temperature acquisition element (311), the antenna (316) and the vibration acquisition element (312) are all electrically connected to the circuit board (314), and the antenna (316) is wirelessly connected to the information receiving module (32).

7. The connecting rod device according to claim 6, characterized in that, The housing (313) includes a non-metallic shell (3131) and a metal bottom plate (3132). The metal bottom plate (3132) is fixedly connected to the end of the connecting rod (10) through a fastener. The non-metallic shell (3131) is buckled on the metal bottom plate (3132) to enclose an accommodation space. The circuit board (314) and the battery (315) are both arranged inside the accommodation space.

8. The connecting rod device according to claim 6 or 7, characterized in that The data acquisition module (31) further includes an elastic member (317), and the elastic member (317) is arranged inside the second mounting hole (12) and elastically connects the housing (313) and the temperature acquisition element (311).

9. The connecting rod device according to any one of claims 1 to 7, characterized in that, The connecting rod (10) includes a large end and a small end which are arranged opposite to each other. The monitoring assembly (30) is arranged on at least one of the large end and the small end.

10. A plunger pump, characterized in that, It includes the connecting rod device according to any one of claims 1 to 9.

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