Locking nut anti-back-off device for a pump

Abstract

The utility model discloses a locking nut anti -backoff device for pump for locking and preventing the backoff of locking bolt on pump valve box, locking nut anti -backoff device for pump includes polygon head and connecting plate, the polygon head is the pole body, and one end inserts the inner hole of locking bolt, and the other end protrudes on the locking bolt surface, and is connected one end of connecting plate, and the other end of connecting plate is connected with the surface of pump valve box, the anti -backoff device of the utility model can make locking nut prevent backoff, and the backoff of locking nut is prevented under reasonable torque through the equal division angle of adjusting bolt connecting hole number on connecting plate and on the index circle, the equal division angle of bolt mounting hole on valve box and on the index circle to refine adjustment angle to realize.

Description

Technical Field

[0001] This utility model relates to the field of anti-return devices for locking nuts. More specifically, this utility model relates to an anti-return device for locking nuts used in pumps. Background Technology

[0002] As oil extraction becomes increasingly difficult and demanding, the requirements for oilfield equipment are rising. Cementing and fracturing pumps, as core components of this equipment, face even stricter requirements. A cementing and fracturing pump consists of a hydraulic end and a power end. The hydraulic end, as the primary pressure-bearing component, is a key focus during oilfield operations. During cementing or fracturing, pressure pulsations can cause the hydraulic end lock nut to come loose. When this happens, a gap forms between the suction cap and the lock nut. The pulsating pressure causes slight displacement of the suction cap, accelerating seal wear and increasing the risk of leakage. More seriously, the increased impact force on the lock nut makes the valve box threads prone to deformation or cracking. Deformed threads prevent the lock nut from being removed, increasing on-site construction and maintenance costs and time. Cracked threads render the valve box unusable, resulting in significant economic losses. Utility Model Content

[0003] In order to achieve these objectives and other advantages of the present invention, a preferred embodiment of the present invention provides a pump locking nut anti-retraction device for locking the locking bolts on the pump valve box to prevent them from retraction. The pump locking nut anti-retraction device includes a polygonal head and a connecting plate. The polygonal head is a rod, one end of which is inserted into the inner hole of the locking bolt, and the other end protrudes from the surface of the locking bolt and is connected to one end of the connecting plate. The other end of the connecting plate is connected to the surface of the pump and valve box.

[0004] Preferably, the pump valve box surface has several bolt mounting holes, and the end surface of the connecting plate away from the locking nut has several bolt connection holes. The bolt passes through one of the bolt connection holes and is inserted into one of the bolt mounting holes. The installation position of the connecting plate can be adjusted by selecting bolt connection holes and bolt mounting holes in different positions.

[0005] Preferably, the plurality of bolt mounting holes are distributed in a pitch circle around the locking nut, the bolt connection holes are distributed in a pitch circle, and the average angle of the bolt mounting holes is different from that of the bolt connection holes.

[0006] Preferably, the pump valve box surface is provided with a threaded hole, which has an internal thread of the pump valve box, and the locking nut is threadedly connected to the internal thread of the pump valve box through the locking nut external thread on its surface.

[0007] Preferably, the shape of the polygonal head is adapted to the shape of the locking bolt so that the polygonal head can be inserted into the locking bolt for locking.

[0008] Preferably, the polygonal head and the connecting plate are welded together at one end.

[0009] This utility model has at least the following beneficial effects: The anti-retraction device of this utility model can prevent the lock nut from re-engaging. By adjusting the number of bolt connection holes on the connecting plate and the evenly divided angle on the pitch circle, and the bolt mounting holes on the valve box and the evenly divided angle on the pitch circle, the adjustment angle can be refined to achieve reasonable torque and prevent the lock nut from re-engaging.

[0010] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the anti-return locking device for the pump lock nut in this utility model. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0013] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0014] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0015] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0016] like Figure 1 As shown, a preferred embodiment of this utility model provides a pump locking nut anti-return device for locking the locking bolt 2 on the pump valve box 1 to prevent it from relapsing. The pump locking nut anti-return device includes a polygonal head 3.1 and a connecting plate 3.2. The polygonal head 3.1 is a rod, one end of which is inserted into the inner hole of the locking bolt 2, and the other end protrudes from the surface of the locking bolt 2 and is connected to one end of the connecting plate 3.2. The other end of the connecting plate 3.2 is connected to the surface of the pump valve box.

[0017] When the pump is running, the pump valve box 1 and its internal components will vibrate, which may cause the locking bolt 2 to rotate around its own axis and tend to disengage. At this time, because the polygonal head 3.1 is inserted into the inner hole of the locking bolt 2, the polygonal head 3.1 and the locking bolt 2 are circumferentially fixed. The polygonal head 3.1 is also connected to the surface of the pump valve box 1 through the connecting plate 3.2, which restricts the circumferential rotation of the polygonal head 3.1, thereby restricting the circumferential rotation of the locking bolt 2. This prevents disengagement. The above device can effectively prevent the locking bolt 2 from disengaging under the vibration environment of pump operation. Furthermore, the device has a simple structure, is easy to install, and requires minimal modification to the original structure of the pump valve box 1 and the locking bolt 2.

[0018] In another technical solution, the surface of the pump valve box 1 is provided with several bolt mounting holes 1.1, and the surface of the connecting plate 3.2 away from the locking nut is provided with several bolt connection holes 3.2.1. The bolt 3.3 passes through one of the bolt connection holes 3.2.1 and is inserted into one of the bolt mounting holes 1.1. The installation position of the connecting plate can be adjusted by selecting different positions of the bolt connection holes 3.2.1 and different positions of the bolt mounting holes 1.1.

[0019] The above technical solution provides multiple bolt mounting holes 1.1 on the surface of the pump valve box 1 and multiple bolt connection holes 3.2.1 on the connecting plate 3.2, offering various combinations of hole positions. Each combination corresponds to a mounting position on the connecting plate 3.2, thereby enabling adjustment of the mounting position of the connecting plate 3.2 and ensuring that the polygonal head 3.1 can always accurately insert into the inner hole of the locking bolt 2 and play a limiting role. This greatly improves the versatility and adaptability of the device, enabling it to cope with various positional deviations during the processing and use of the pump valve box 1, and achieving effective limiting without reprocessing the pump valve box 1 or the connecting plate 3.2.

[0020] In another technical solution, a plurality of bolt mounting screw holes 1.1 are distributed in a pitch circle around the locking nut 2, and the bolt connection holes 3.2.1 are distributed in a pitch circle. The average angle of the bolt mounting screw holes 1.1 and the average angle of the bolt connection holes 3.2.1 are different.

[0021] The above technical solution utilizes different evenly spaced angles to make the distribution density of bolt connection holes 3.2.1 and bolt mounting screw holes 1.1 on the pitch circle different. Thus, when rotating the connecting plate 3.2, more different hole alignment combinations can be found. Even if there is a slight angular deviation in the connecting plate 3.2 after the polygonal head 3.1 is inserted into the inner hole of the locking bolt 2, a suitable hole position can be found by rotation for fixing, ensuring that the polygonal head 3.1 effectively limits the locking bolt 2.

[0022] In another technical solution, the pump valve box surface is provided with a threaded hole, which has an internal thread 1.2. The locking nut is threadedly connected to the internal thread 1.2 of the pump valve box through its external thread 2.1. The threaded connection achieves a reliable connection between the locking bolt 2 and the pump valve box 1, providing a basis for the subsequent installation of the anti-recoil device. At the same time, the detachability of the threaded connection facilitates subsequent maintenance and component replacement.

[0023] In another technical solution, the shape of the polygonal head is adapted to the shape of the locking bolt 2, so that the polygonal head can be inserted into the locking bolt 2 for locking. This ensures the reliability of the polygonal head 3.1 in limiting the locking bolt 2, avoids the problem of limiting failure caused by the gap between the two, and can stably limit the rotation of the locking bolt 2 even in long-term vibration environment.

[0024] In another technical solution, the polygonal head and the connecting plate are welded together at one end. This fixed welding ensures a reliable connection between the polygonal head 3.1 and the connecting plate 3.2, guaranteeing the overall structural stability of the anti-reverse buckle device.

[0025] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A locking nut anti-return device for pumps, used to lock and prevent the locking bolts on the pump valve box from relapsing, characterized in that, The anti-reverse locking device for the pump lock nut includes a multi-angled head and a connecting plate; The polygonal head is a rod, one end of which is inserted into the inner hole of the locking bolt, and the other end protrudes from the surface of the locking bolt and is connected to one end of the connecting plate. The other end of the connecting plate is connected to the surface of the pump and valve box.

2. The anti-return locking device for pump locking nuts according to claim 1, characterized in that, The pump valve box has several bolt mounting holes on its surface, and the connecting plate has several bolt connection holes on its surface away from the locking nut. The bolt passes through one of the bolt connection holes and is inserted into one of the bolt mounting holes. The installation position of the connecting plate can be adjusted by selecting different bolt connection holes and bolt mounting holes.

3. The anti-return locking device for pump locking nuts according to claim 2, characterized in that, The bolt mounting holes are distributed in a pitch circle around the locking nut, and the bolt connection holes are also distributed in a pitch circle. The average angle of the bolt mounting holes is different from that of the bolt connection holes.

4. The anti-return locking device for pump nut according to claim 1, characterized in that, The pump valve box surface is provided with a threaded hole, which has an internal thread. The locking nut is connected to the internal thread of the pump valve box through the external thread of the locking nut on its surface.

5. The anti-return locking device for pump locking nuts according to claim 1, characterized in that, The shape of the polygonal head is adapted to the shape of the locking bolt so that the polygonal head can be inserted into the locking bolt for locking.

6. The anti-return locking device for pump locking nuts according to claim 1, characterized in that, The polygonal head is welded to one end of the connecting plate.

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