An eccentric pusher

Abstract

The utility model discloses a kind of eccentric pushers, belong to well logging device technical field, it includes shell, and respectively set in transmission assembly, thrust plate, spring rod assembly, potentiometer assembly, connecting frame and push arm in shell inside;Its characterized in that: the output end of transmission assembly is driven with the one end of spring rod in spring rod assembly Connection;The other end of spring rod is provided with connector, and the end of connector is provided with the pressing plate of pull rod transmission connection with potentiometer assembly;The potentiometer assembly is set to the side of spring rod assembly away from transmission assembly;The push arm is L-shaped, and knick point position is hinged with shell, and end portion is matched with connector.The utility model has the advantages that space utilization is significantly improved transmission stability is strong.

Description

Technical Field

[0001] This utility model relates to the field of well logging equipment technology, specifically to an eccentric pusher structure. Background Technology

[0002] The eccentric pusher is a key piece of equipment in the logging process. Its core function is to drive the transmission mechanism by a motor to make the pusher arm contact the well wall, and at the same time, the displacement of the mechanism is sensed by a potentiometer and converted into a resistance signal to realize the acquisition of logging data.

[0003] In existing eccentric pusher structures, such as the combined logging tool pusher disclosed in patent application CN101892835A, the potentiometer assembly is arranged between the transmission assembly and the spring rod assembly. The transmitted force directly controls the length of the potentiometer's pull rod through the hook, thereby adjusting the resistance value to complete the logging operation. However, this traditional structure has significant drawbacks: the intermediate arrangement of the potentiometer assembly occupies the core installation space between the transmission assembly and the spring rod assembly, resulting in low overall structural space utilization; at the same time, due to the compact layout of the components and the potentiometer assembly's central internal position, the disassembly and assembly process is cumbersome, causing great inconvenience to later maintenance and repair work, increasing usage costs and maintenance cycles.

[0004] To solve the above technical problems, there is an urgent need for an eccentric pusher structure with higher space utilization and easier disassembly and maintenance. Utility Model Content

[0005] In view of the shortcomings of existing eccentric pushers, such as low space utilization and inconvenient disassembly and maintenance, this utility model provides an eccentric pusher with high space utilization, which optimizes the component layout, improves space utilization, and simplifies the disassembly and maintenance process.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an eccentric pusher, comprising a housing, and a transmission assembly, a thrust plate, a spring rod assembly, a potentiometer assembly, a connecting frame, and a pusher arm respectively disposed inside the housing; characterized in that: the output end of the transmission assembly is drivenly connected to one end of the spring rod in the spring rod assembly; the other end of the spring rod is provided with a connector, and the end of the connector is provided with a pressure plate that is drivenly connected to the pull rod of the potentiometer assembly; the potentiometer assembly is disposed on the side of the spring rod assembly away from the transmission assembly; the pusher arm is L-shaped, with the inflection point hinged to the housing, and the end cooperating with the connector.

[0007] Furthermore, the joint between the thrust plate and the spring rod is an elongated hole.

[0008] The end of the push arm is further connected to the middle of the connector through a push arm connecting plate.

[0009] Furthermore, the thrust plate and spring rod assembly are fixed by threaded connection or pin.

[0010] Furthermore: the connector and the pressure plate are integrally formed, with one end fixed to the spring rod assembly by threads, and the body is hinged to the push arm.

[0011] Furthermore, one end of the spring rod is slidably engaged with a fixed block fixed on the housing, and the other end is provided with a slider, which is slidably engaged with the housing; a spring is sleeved on the outside of the spring rod, and the two ends of the spring are engaged with the fixed block and the slider, respectively.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This solution significantly improves space utilization: by moving the potentiometer assembly from the middle position between the transmission assembly and the spring rod assembly to a position behind the spring rod assembly, the potentiometer assembly avoids occupying the core transmission space, making the layout of each component more compact and reasonable. At the same time, the adjusted potentiometer assembly is located in the push arm cavity, without occupying or adding other space, effectively improving the utilization rate of the internal space of the pusher.

[0013] Easier disassembly and maintenance: The rear-mounted layout of the potentiometer assembly separates it from the core transmission area. When disassembling or repairing the potentiometer, there is no need to disassemble the core transmission components such as the transmission assembly and spring rod assembly, which simplifies the operation process, reduces the difficulty of maintenance, and saves maintenance time and costs.

[0014] Strong transmission stability: The spring rod assembly, push arm, and potentiometer pull rod are synchronously transmitted through the connector. On the one hand, it can stably drive the push arm to contact the well wall, and on the other hand, it can accurately compress the potentiometer pull rod. With the help of the reset spring in the potentiometer, it can achieve automatic reset, ensuring the accuracy of resistance value adjustment and the reliability of logging data. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] In the diagram, the markings are as follows: 1 is the transmission assembly; 101 is the output end of the transmission assembly; 2 is the spring rod assembly; 201 is the spring rod; 202 is the connector; 203 is the pressure plate; 204 is the fixing block; 205 is the slider; 206 is the spring; 3 is the potentiometer assembly; 301 is the potentiometer assembly pull rod; 4 is the push plate; 401 is the oblong hole; 5 is the connecting frame; 6 is the push arm; 601 is the push arm connecting plate; 7 is the housing; 71 is the push arm receiving cavity. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As shown in Figures 1-2, this utility model discloses an eccentric pusher, including a housing 7, and a transmission assembly 1, a thrust plate 4, a spring rod assembly 2, a potentiometer assembly 3, a connecting frame 5, and a pusher arm 6 respectively disposed inside the housing 7; wherein: The output end 101 of the transmission assembly 1 is drivenly connected to one end of the spring rod 201 in the spring rod assembly 2; The other end of the spring rod 201 is provided with a connector 202, and the end of the connector 202 is provided with a pressure plate 203 that is connected to the pull rod 301 of the potentiometer assembly 3 in a transmission manner; The potentiometer assembly 3 is located on the side of the spring rod assembly 2 away from the transmission assembly 1; The push arm 6 is L-shaped, with its inflection point hinged to the housing 7, and its end cooperating with the connector 202 via a connecting bracket 5.

[0019] Preferably, the mating point between the thrust plate 4 and the spring rod 201 is an elongated hole 401. The elongated hole and the fixing pin can slide together. This ensures that stopping the transmission assembly during logging does not affect the movement of the spring rod.

[0020] Preferably, the end of the push arm 6 is connected to the middle of the connector 202 through the push arm connecting plate 601.

[0021] Preferably, the thrust plate 4 and the spring rod assembly 2 are fixed by a pin.

[0022] Preferably, the connector 202 and the pressure plate 203 are integrally formed or bolted together. One end of the connector is fixed to the spring rod assembly 2 by threads, and the body is hinged to the push arm 6.

[0023] Preferably, one end of the spring rod 201 is slidably engaged with the fixing block 204 fixed on the housing 7, and the other end is provided with a slider 205, which is slidably engaged with the housing 7; a spring 206 is sleeved on the outside of the spring rod 201, and the two ends of the spring 206 are engaged with the fixing block 204 and the slider 205 respectively.

[0024] Preferably, the potentiometer assembly 3 also includes a battery and a wireless transmission module. The battery powers the potentiometer assembly, and the wireless transmission module transmits signals unidirectionally or bidirectionally.

[0025] The working principle of this embodiment: During well logging operations, the motor on the drive transmission assembly drives the output end of the transmission assembly upward ( Figure 1 The left side moves, pulling the spring rod upward, which in turn causes the push arm to enter the push arm receiving cavity 71 inside the housing, level with the housing, ensuring the advancement or descent of the logging instrument. When lifting or when measurement is required, the output end of the drive transmission assembly moves downward. After reaching a certain position, the motor stops rotating. At this time, the compressed spring acts to maintain the downward movement of the slider, causing the push arm to open. The push arm is opened at a certain angle by the well diameter, and the angle can be changed according to the size of the well diameter. At the same time, the pressure plate 203 also moves to a certain position. Since it abuts against or is fixed to the potentiometer assembly pull rod (i.e., the measuring end), the corresponding signal change can be obtained through the retraction of the pull rod, thereby realizing the acquisition of logging data.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An eccentric pusher, comprising a housing, and a transmission assembly, a thrust plate, a spring rod assembly, a potentiometer assembly, a connecting frame, and a pusher arm respectively disposed inside the housing; characterized in that: The output end of the transmission assembly is drivenly connected to one end of the spring rod in the spring rod assembly; The other end of the spring rod is provided with a connector, and the end of the connector is provided with a pressure plate that is connected to the pull rod drive of the potentiometer assembly; The potentiometer assembly is located on the side of the spring rod assembly away from the transmission assembly; The push arm is L-shaped, with its inflection point hinged to the housing and its end engaging with the connector.

2. The eccentric pusher according to claim 1, characterized in that: The joint between the thrust plate and the spring rod is an elongated hole.

3. The eccentric pusher according to claim 1, characterized in that: The end of the push arm is connected to the middle of the connector through a push arm connecting plate.

4. The eccentric pusher according to claim 1, characterized in that, The thrust plate and the spring rod assembly are fixed by threaded connection or pin.

5. The eccentric pusher according to claim 1, characterized in that: The connector and pressure plate are integrally formed, with one end fixed to the spring rod assembly by threads, and the body is hinged to the push arm.

6. The eccentric pusher according to claim 1, characterized in that, One end of the spring rod is slidably engaged with a fixed block fixed on the housing, and the other end is provided with a slider that is slidably engaged with the housing; a spring is sleeved on the outside of the spring rod, and the two ends of the spring are engaged with the fixed block and the slider, respectively.

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