Plunger pump

Abstract

The utility model discloses a plunger pump, and belongs to the technical field of oil and gas exploitation, the plunger pump comprises a crankshaft, a connecting rod, a bearing bush, a temperature detection piece and a battery, the connecting rod is provided with a connecting rod hole, the crankshaft is assembled in the connecting rod hole, and the bearing bush is arranged between the crankshaft and the connecting rod; the connecting rod is further provided with a detection hole, the detection hole is communicated with the connecting rod hole, the temperature detection piece is electrically connected with the battery, and the temperature detection piece is installed in the detection hole so as to detect the temperature of the bearing bush. According to the plunger pump, whether the bearing bush at the crankshaft is burnt or not can be determined by detecting the working temperature of the bearing bush at the crankshaft in the plunger pump, so that a new bearing bush can be replaced in time, the plunger pump can be prevented from being greatly damaged, and it is guaranteed that normal operation can be conducted stably.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil and gas exploitation, and particularly relates to a plunger pump. BACKGROUND

[0002] In the process of oil and gas exploitation, the working pressure of the plunger pump used to provide fracturing operation is higher and higher, and under the condition that the rod load of the connecting rod is correspondingly increased, the working stress of the bearing bush at the crankshaft is gradually increased. In this case, if any of the conditions such as machining precision, assembly process and lubrication condition is problematic, the bearing bush at the crankshaft is extremely prone to the phenomenon of bush burning, and in severe cases, the crankshaft may be seized and burned, causing huge losses. Since the current plunger pump does not have the function of obtaining whether the bearing bush is burned, the bearing bush is still used as a normal device after the phenomenon of bush burning occurs, which is prone to cause greater damage to the plunger pump and seriously affect the normal operation process. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide a plunger pump which can determine whether the bearing bush at the crankshaft is burned by detecting the working temperature of the bearing bush at the crankshaft, so as to replace the new bearing bush in time, prevent greater damage to the plunger pump, and ensure that the normal operation can proceed steadily.

[0004] The embodiment of the application discloses a plunger pump which comprises a crankshaft, a connecting rod, a bearing bush, a temperature detection member and a battery, the connecting rod is provided with a connecting rod hole, the crankshaft is assembled in the connecting rod hole, and the bearing bush is arranged between the crankshaft and the connecting rod.

[0005] The connecting rod is further provided with a detection hole which is in communication with the connecting rod hole, the temperature detection member is electrically connected with the battery, and the temperature detection member is installed in the detection hole to detect the temperature of the bearing bush.

[0006] The embodiment of the application discloses a plunger pump, the crankshaft of which is assembled in the connecting rod hole of the connecting rod, and the bearing bush is arranged between the crankshaft and the connecting rod. The connecting rod is further provided with a detection hole which is in communication with the connecting rod hole, the temperature detection member is installed in the detection hole, and the temperature detection member is further connected with the battery. Thus, the temperature detection member can detect the temperature of the bearing bush, determine the working state of the bearing bush through the temperature of the bearing bush, and obtain the situation that the bearing bush is burned in time through the detection result of the temperature detection member when the bearing bush is burned. Thus, the plunger pump is stopped and the new bearing bush is replaced, so that greater damage to the plunger pump caused by the bearing bush burned is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0007] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0008] Figure 1 A schematic diagram of a part of a structure of a connecting rod in a plunger pump according to an embodiment of the application;

[0009] Figure 2 A schematic diagram of a part of a structure of a plunger pump according to an embodiment of the application; Figure 1 A schematic diagram of a cross section of a part of a structure of a plunger pump according to an embodiment of the application;

[0010] Figure 3 A schematic diagram of a monitoring principle of a plunger pump according to an embodiment of the application.

[0011] Reference signs:

[0012] 1 - wireless transmitting device, 2 - bearing, 3 - connecting rod, 4 - protective shell, 5 - battery, 6 - circuit board, 7 - temperature detecting device, 8 - wireless receiving device, 9 - control device. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0014] The terms "first", "second", and the like in the specification and claims of the application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category, and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0015] As Figures 1-3 shown, the application discloses a plunger pump, which can detect the temperature of the bearing 2 at the crankshaft to determine the working state of the bearing 2 and obtain the situation of bearing 2 burning, so as to prevent the plunger pump from being damaged more seriously. As Figure 1 and Figure 2As shown, the plunger pump comprises a crankshaft, a connecting rod 3, a bearing 2, a temperature detection member 7 and a battery 5, of course, the plunger pump can also generally include other devices and mechanisms such as a plunger, a pull rod and a cross head, and for the sake of brevity, they will not be introduced here.

[0016] Among them, the crankshaft and the connecting rod 3 are the power transmission devices of the power end and the liquid end in the plunger pump, the connecting rod 3 is provided with a connecting rod hole, and the crankshaft can be assembled in the connecting rod hole, so that the connecting rod 3 can move linearly under the action of the rotation of the crankshaft, and in turn drive the cross head and the pull rod connected to the other end of the connecting rod 3 to move linearly, and complete the pumping work of the liquid.

[0017] As above, the connecting rod 3 is provided with a connecting rod hole, and for this reason, the connecting rod 3 is sleeved outside the crankshaft, of course, in order to ensure that the connecting rod 3 can form the aforementioned assembly relationship with the crankshaft, the connecting rod 3 generally includes a detachable two-part structure, namely a connecting rod body and a connecting rod cover, and the two can be detachably fixedly connected through bolts and the like, and in turn, in the process of assembling the connecting rod 3 and the crankshaft, the connecting rod body and the connecting rod cover can be installed from the opposite sides of the crankshaft, and then they are detachably fixedly connected, and at the same time, since the connecting rod body and the connecting rod cover both have semicircular groove structures, they can enclose the connecting rod hole after completing the assembly work, and accordingly, the crankshaft is installed in the aforementioned connecting rod hole.

[0018] At the same time, in order to improve the continuity and smoothness of the relative motion between the crankshaft and the connecting rod 3, the bearing 2 is provided between the crankshaft and the connecting rod 3, of course, when the plunger pump is in a working state, the crankshaft, the bearing 2 and the connecting rod 3 are also provided with lubricating materials such as grease or lubricating oil, on the one hand, to further improve the smoothness of the motion between the corresponding two, and on the other hand, the flow of the lubricating material can also take away the heat on the crankshaft and the connecting rod 3, and the bearing 2 therebetween, thereby reducing the working problems of the aforementioned devices and improving the reliability of the plunger pump.

[0019] In order to obtain the working state of the bearing 2, in the embodiment of the present application, the connecting rod 3 is further provided with a detection hole. In a specific embodiment of the present application, the detection hole can be formed on the connecting rod body. In order to minimize the adverse effects of the detection hole on the overall structural reliability of the connecting rod 3, in another embodiment of the present application, the detection hole is provided on the connecting rod cover. At the same time, the temperature detection member 7 is installed in the detection hole, and the detection hole is in communication with the connecting rod hole, so as to ensure that the area where the bearing 2 is located can be in a communication state with the detection hole, and thus the temperature detection member 7 can detect the temperature around the bearing 2 through the detection hole, so as to determine the working state of the bearing 2 through the temperature of the bearing 2, and thus the situation can be learned in time when the bearing 2 burns, preventing greater damage to the plunger pump due to the burning of the bearing 2. More specifically, the detection head of the temperature detection member 7 can directly contact the bearing 2 to achieve the purpose of detecting the temperature of the bearing 2, or in other embodiments of the present application, the temperature of the bearing 2 can also be indirectly obtained through the temperature of the lubricating oil flowing into the detection hole.

[0020] As described above, the temperature detection member 7 can be installed in the detection hole. Of course, in order to ensure that the temperature detection member 7 can work normally to provide temperature detection, in the embodiment of the present application, the temperature detection member 7 in the plunger pump is also electrically connected with the battery 5, so as to use the battery 5 to provide energy for the temperature detection member 7, and ensure that the temperature detection member 7 can detect the temperature of the bearing 2 at the crankshaft. Alternatively, by designing the size of the detection hole, the battery 5 can also be installed in the detection hole, and the battery 5 is located on the side of the temperature detection member 7 away from the connecting rod hole. In other words, the distance between the temperature detection member 7 and the connecting rod hole is relatively smaller, and the distance between the battery 5 and the connecting rod hole is relatively larger.

[0021] The embodiment of the present application discloses a plunger pump, the crankshaft of which is assembled in the connecting rod hole of the connecting rod 3, and the bearing 2 is arranged between the crankshaft and the connecting rod 3. The connecting rod 3 is further provided with a detection hole, and the detection hole is in communication with the connecting rod hole. The temperature detection member 7 is installed in the detection hole, and the temperature detection member 7 is further connected with the battery 5, so that the temperature detection member 7 can detect the temperature of the bearing 2, and determine the working state of the bearing 2 through the temperature of the bearing 2, so that the situation can be learned in time through the detection result of the temperature detection member 7 when the bearing 2 burns, so as to control the plunger pump to stop and replace the new bearing 2, preventing greater damage to the plunger pump due to the continuous work of the bearing 2 that burns.

[0022] In order to ensure that the detection result of the temperature detection piece 7 can be known by the staff or the control device 9, in the embodiment of the application, the temperature detection piece 7 can be provided with an alarm function, or an alarm device can be provided for the temperature detection piece 7, and the alarm device is connected with the temperature detection piece 7, and then when the detection value of the temperature detection piece 7 exceeds the preset value, the alarm device can alarm in the form of a sound signal.

[0023] In another embodiment of the application, the plunger pump can also include wireless sending device 1, and in order to enable the wireless sending device 1 to reliably form an assembly relationship with the connecting rod 3, the plunger pump also includes a protective shell 4, and the protective shell 4 is fixedly installed on the connecting rod 3, of course, the protective shell 4 is located on the outside of the connecting rod 3, that is, the protective shell 4 can be fixedly connected to the outer surface of the connecting rod 3, and the connection mode between the two can include clamping or bonding and the like.

[0024] In the case of the plunger pump including the protective shell 4, the battery 5 and the wireless sending device 1 can be installed in the protective shell 4, thereby providing protection for the battery 5 and the wireless sending device 1 by the protective shell 4, and reducing the installation difficulty of the two, and at the same time, the size of the detection hole can also be relatively small. More specifically, the plunger pump also includes a circuit board 6, and the wireless sending device 1 can be welded on the circuit board 6, and the battery 5 is electrically connected with the circuit board 6 to indirectly supply power to the wireless sending device 1 through the circuit board 6.

[0025] Of course, in order to ensure that the temperature detection piece 7 installed in the detection hole can still normally connect with the battery 5, in the embodiment of the application, the detection hole can extend to the outer surface of the connecting rod 3, and the detection hole is arranged opposite to the protective shell 4, which can ensure that the battery 5 can form an electrical connection relationship with the temperature detection piece 7 installed in the detection hole through a lead wire, so that the battery 5 can normally supply power to the temperature detection piece 7. At the same time, in the embodiment of the application, the temperature detection piece 7 also needs to be communicatively connected with the wireless sending device 1, so that the detection value of the temperature detection piece 7 can be sent to the outside of the plunger pump through the wireless sending device 1, and be known by the user or the control device 9, so that when the detection value of the temperature detection piece 7 exceeds the preset value, the plunger pump can be controlled to stop working for maintenance in time.

[0026] Of course, during the working process of the plunger pump, a wireless receiving device 8 needs to be provided corresponding to the wireless sending device 1, and optionally, the wireless receiving device 8 is installed on the control device 9 far away from the well site, and in another embodiment of the application, the wireless receiving device 8 can be installed outside the housing of the plunger pump, in which case the position of the wireless receiving device 8 is not affected by the driving actions such as movement and rotation inside the plunger pump, and the distance between the wireless receiving device 8 and the wireless sending device 1 inside the plunger pump is relatively small, so as to ensure that the communication connection stability between the two is relatively good.

[0027] Of course, the wireless receiving device 8 can be provided with a display screen or the like, so that the detection value of the temperature detection member 7 can be transmitted to the wireless receiving device 8 via the wireless transmitting device 1 and directly displayed on the aforementioned display screen when the temperature detection member 7 is in operation, which enables the user to obtain the working state of the bearing bush 2 at the crankshaft of the plunger pump by observing the temperature indication on the display screen. Similarly, the wireless receiving device 8 can also be provided with an alarm device, so as to issue an alarm information such as a sound signal when the detection value of the temperature detection member 7 exceeds a preset value.

[0028] In further embodiments of the present application, the wireless receiving device 8 can also be communicatively connected with the control device 9, so that the temperature information received by the wireless receiving device 8 can be transmitted to the control device 9, enabling the user or the control device 9 to more intuitively and comprehensively obtain the working state of the plunger pump. In order to improve the communication stability of the wireless receiving device 8, the wireless receiving device 8 and the control device 9 are communicatively connected through a cable in the embodiments of the present application.

[0029] As described above, the battery 5 and the wireless transmitting device 1 are both mounted in the protective shell 4. More specifically, the protective shell 4 can include a shell body and a base plate, wherein the shell body and the base plate are fixedly connected, for example, the two can be detachably fixedly connected through connecting members such as screws, or the shell body and the base plate can be fixedly connected in a manner that cannot be detached, such as by adhesion. In order to minimize the shielding effect of the protective shell 4 on the transmission efficiency of the wireless transmitting device 1, the shell body is formed of a non-metallic material in the embodiments of the present application, for example, the shell body can be formed of a plastic material or the like. In order to improve the mechanical properties such as the strength of the shell body and its oil resistance and high temperature resistance, the shell body includes polyhexamethylene adipamide and glass fiber in a specific embodiment of the present application. Specifically, the glass fiber can be mixed in the polyhexamethylene adipamide material, and the shell body of the desired shape and size can be formed.

[0030] At the same time, in order to ensure the assembly reliability between the protective shell 4 and the connecting rod 3, the base plate is formed of a metallic material in the embodiments of the present application, and the base plate is fixedly connected with the connecting rod 3. Specifically, the base plate and the connecting rod 3 can be fixedly connected with each other by welding. In another embodiment of the present application, the base plate can be provided with a plurality of assembly holes, and a threaded connecting member can be arranged in each assembly hole. Of course, the connecting rod 3 is provided with a plurality of threaded holes, and the plurality of threaded holes, the plurality of assembly holes and the plurality of threaded connecting members correspond one-to-one. In this case, the base plate can be fixedly connected with the connecting rod 3 through the plurality of threaded connecting members, which can reduce the assembly difficulty between the base plate and the connecting rod 3, and also can ensure that the base plate and the connecting rod 3 can form a relatively reliable fixed connection relationship.

[0031] As described above, the temperature detecting member 7 is installed in the detecting hole, and can work under the energizing of the battery 5, and detects the temperature of the bearing shell 2 at the crankshaft. Optionally, the temperature detecting member 7 is in a continuous working state, that is, under the condition that the battery 5 can provide energy, the temperature detecting member 7 detects the temperature of the bearing shell 2 regardless of whether the plunger pump is in a working state.

[0032] In order to improve the endurance of the battery 5 and the service life of the temperature detecting member 7, in another embodiment of the present application, the temperature detecting member 7 can also detect the temperature of the bearing shell 2 at the crankshaft only when the plunger pump is working. For example, the temperature detecting member 7 can be provided with a control member and a wireless receiving member 8, so that the control command from the outside can be transmitted to the control member through the wireless receiving member 8, and then the control purpose of the temperature detecting member 7 is achieved by using the control member.

[0033] In order to reduce the control difficulty of the temperature detecting member 7, in another embodiment of the present application, the plunger pump further comprises a vibration detecting member to determine whether the plunger pump is in a working state by using the vibration condition of the connecting rod 3. In detail, the temperature detecting member 7 and the battery 5 are connected with the vibration detecting member, and the vibration detecting member is used to detect vibration information. Therefore, in the embodiment of the present application, the vibration detecting member is installed on the connecting rod 3, so that the vibration detecting member can obtain the vibration condition of the connecting rod 3. Based on this, when the connecting rod 3 is working, the temperature detecting member 7 is working, thereby reducing the detection frequency of the temperature detecting member 7, improving the endurance of the battery 5 and the service life of the temperature detecting member 7. Specifically, when the plunger pump comprises a protective shell 4, the vibration detecting member can also be installed in the protective shell 4, and the vibration detecting member can be directly installed on the base plate of the protective shell 4, so that the detection sensitivity and reliability of the vibration detecting member are relatively high.

[0034] In the above embodiment, the plunger pump can be a single-cylinder structure, and in other embodiments of the present application, the plunger pump can also be a multi-cylinder structure, in which case, only one connecting rod 3 can be provided with a detecting hole, and the temperature detecting member 7 is correspondingly installed.

[0035] In other embodiments of the present application, when the plunger pump is a multi-cylinder structure, the number of connecting rods 3, bearing shells 2 and temperature detecting members 7 is multiple, each connecting rod 3 is provided with a connecting rod hole and a detecting hole, a plurality of bearing shells 2 are installed in the plurality of connecting rod holes one by one, and a plurality of temperature detecting members 7 are installed in the plurality of detecting holes to detect the temperature of the corresponding bearing shell 2, which can ensure that the temperature of the bearing shell 2 between each crankshaft and the corresponding connecting rod 3 can be detected by the corresponding temperature detecting member 7, so as to ensure that the working state of each bearing shell 2 can be obtained in time.

[0036] Correspondingly, the plurality of temperature detecting members 7 one-to-one correspond to the wireless transmitting devices 1, so that the temperature information of the bearing 2 at each crankshaft can be transmitted out of the plunger pump. Optionally, the number of the wireless receiving devices 8 can also be multiple, and one-to-one correspond to the plurality of wireless transmitting devices 1, as shown in Figure 3 In another embodiment of the application, the number of the wireless receiving devices 8 can be one, and the plurality of wireless transmitting devices 1 all correspond to the cover wireless receiving device 8, and the wireless receiving device 8 is connected to the control device 9 through a wired or wireless manner.

[0037] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements recited, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0038] The embodiments of the application are described above in conjunction with the drawings, but the application is not limited to the specific embodiments described above, which are only illustrative and not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the application without departing from the scope of the application and the scope protected by the claims.

Claims

1. A piston pump characterized in that, The connecting rod (3) is further provided with a detection hole in communication with the connecting rod hole, the temperature detection member (7) is electrically connected with the battery (5), and the temperature detection member (7) is installed in the detection hole to detect the temperature of the bearing bush (2). Further comprising a protective shell (4) and a wireless sending device (1), the protective shell (4) is fixedly installed on the connecting rod (3), the detection hole extends to the outer surface of the connecting rod (3) and is arranged opposite to the protective shell (4), the battery (5) and the wireless sending device (1) are both installed in the protective shell (4), and the wireless sending device (1) is electrically connected with the battery (5), and the temperature detection member (7) is in communication connection with the wireless sending device (1).

2. The piston pump of claim 1, wherein, Further comprising a wireless receiving device (8), the wireless receiving device (8) is installed outside the housing of the plunger pump, the wireless receiving device (8) is in communication connection with the wireless sending device (1), and the wireless receiving device (8) is in communication connection with a control device (9).

3. The piston pump of claim 2, wherein, The wireless receiving device (8) is in communication connection with the control device (9) through a cable.

4. The piston pump of claim 3, wherein, The protective shell (4) comprises a fixedly connected shell and a base plate, the shell is formed of a non-metallic material, the base plate is formed of a metallic material, and the base plate is fixedly connected with the connecting rod (3).

5. The piston pump of claim 2, wherein, The base plate is provided with a plurality of assembly holes, each of the assembly holes is provided with a threaded connecting piece, and the base plate is fixedly connected with the connecting rod (3) through a plurality of threaded connecting pieces.

6. The piston pump of claim 5, wherein, The shell comprises polyhexamethylene adipamide and glass fiber.

7. The piston pump of claim 5, wherein, Further comprising a vibration detection member, the temperature detection member (7) and the battery (5) are both connected with the vibration detection member, the vibration detection member is installed on the connecting rod (3) to detect whether the connecting rod (3) is in a working state, and the temperature detection member (7) works when the connecting rod (3) works.

8. The piston pump of claim 1, wherein, The connecting rod (3) comprises a connecting rod body and a connecting rod cover, the connecting rod body and the connecting rod cover are fixedly and detachably connected, and surround the connecting rod hole, and the detection hole is arranged on the connecting rod cover.

9. The piston pump of claim 1, wherein, The number of the connecting rod (3), the bearing bush (2) and the temperature detection member (7) is multiple, each of the connecting rod (3) is provided with the connecting rod hole and the detection hole, a plurality of bearing bushes (2) are one-to-one correspondingly installed in a plurality of connecting rod holes, and a plurality of temperature detection members (7) are respectively installed in a plurality of detection holes to respectively detect the temperature of the corresponding bearing bush (2).

10. The piston pump of claim 1, wherein, ​

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