A self-locking mechanism

Abstract

The utility model discloses a self locking mechanism, including installing on the pump body suction liquid cylinder and the discharge liquid jar's self locking subassembly, and self locking subassembly includes valve cover flange and valve cover pressure cylinder, still be equipped with piston cavity on valve cover pressure cylinder, be equipped with piston in piston cavity, just the piston cavity passes through the connecting hole who sets up and introduces the outside power into piston cavity, to make valve cover pressure cylinder move on valve cover flange, be equipped with connecting rod on valve cover flan, and one end of connecting rod passes through piston and valve cover pressure cylinder and is connected with connecting piece. In the process of replacing valve seat, just need to take down valve cover pressure cylinder, need not to disassemble pump body main part, can promote drilling operation efficiency, realizes slurry pump quick replacement, reduces non - production time, reduces manual operation intensity and safety risk, optimizes equipment maintenance process, and one person can complete operation with hoisting tool, and maintenance downtime is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, specifically a self-locking mechanism. Background Technology

[0002] like Figure 1 As shown, the valve cover flange 3 is installed on the pump body 1, and then the valve cover flange 3 is fixed to the pump body using screws. The screw 5 is locked by the nut 4 before disassembly and assembly, leaving no room for movement. In addition, for components such as the hydraulic end of the mud pump that may be in harsh working conditions (such as contact with mud containing particles or corrosive mud, and bearing high pressure), after long-term use, the threads are prone to jamming and seizing due to mud intrusion, corrosion, and wear. This makes the resistance during rotation and disassembly extremely high, making it difficult to disassemble smoothly and taking longer to disassemble and assemble. In scenarios that require frequent maintenance or emergency repairs, this will seriously affect work efficiency and increase labor and time costs. Utility Model Content

[0003] The purpose of this invention is to provide a self-locking mechanism to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a self-locking mechanism, comprising a self-locking assembly, wherein the self-locking assembly includes a valve cover flange and a valve cover cylinder; the valve cover cylinder is further provided with a piston chamber, wherein a piston is provided in the piston chamber, and external power is introduced into the piston chamber through a provided connecting hole, so that the piston causes the valve cover cylinder to move on the valve cover flange; the valve cover flange is provided with a connecting rod, one end of which passes through the piston and the valve cover cylinder and is connected to a provided connecting member.

[0005] As a preferred technical solution of this utility model: the external power introduced by the connecting hole is gas, so as to use the gas source to drive the piston to move the valve cover cylinder downward.

[0006] As a preferred technical solution of this utility model: the external power introduced by the connecting hole is hydraulic oil, so as to use the hydraulic oil to drive the piston to move the valve cover cylinder downward.

[0007] As a preferred technical solution of this utility model: the number of piston chambers is multiple, and the multiple piston chambers are connected and communicated with each other through a medium channel.

[0008] As a preferred technical solution of this utility model, the valve cover flange is movably mounted on the pump body.

[0009] As a preferred technical solution of this utility model: the valve cover flange is further provided with a countersunk hole and is connected to the pump body by bolts passing through the countersunk hole, so as to fix the valve cover flange on the pump body.

[0010] As a preferred technical solution of this utility model: one end of the connecting rod is threadedly engaged with the valve cover flange, and the other end of the connecting rod passes through the valve cover pressure cylinder and is threadedly engaged with the inner wall surface of the connecting piece.

[0011] The beneficial effects of this utility model using the above technical solution are as follows: When it is necessary to replace the valve seat inside the pump body, external power is used to move the locked valve cover cylinder downwards. At this time, a gap is generated between the valve cover cylinder and the facing surfaces of the connecting parts, so as to facilitate the loosening of the connecting parts. Based on this, only the valve cover cylinder needs to be removed during the replacement of the valve seat, without disassembling the main body of the pump body. Therefore, drilling operation efficiency can be improved, mud pump can be replaced quickly, and non-productive time can be reduced. The intensity of manual operation and safety risks are reduced, the equipment maintenance process is optimized, and the operation can be completed by a single person with hoisting tools, which greatly shortens the maintenance downtime. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the suction end pump body structure in the prior art; Figure 2 A schematic diagram of the structure in which the self-locking assembly is installed on the pump body at the suction end; Figure 3 This is an exploded structural diagram of the self-locking component of this utility model; Figure 4 This is a cross-sectional structural diagram of the valve cover pressure cylinder of this utility model.

[0013] In the diagram: 1. Pump body; 2. Self-locking assembly; 20. Valve cover flange; 21. Connecting rod; 22. Piston chamber; 23. Piston; 24. Connecting hole; 25. Connecting piece; 26. Valve cover cylinder; 27. Countersunk hole; 28. Medium passage. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as limiting this utility model.

[0015] Please see Figure 2-4This utility model provides an embodiment of a self-locking mechanism, including a self-locking assembly 2 installed on the suction cylinder and discharge cylinder of the pump body 1. The self-locking assembly 2 includes a valve cover flange 20 and a valve cover cylinder 26. The valve cover cylinder 26 is also provided with a piston chamber 22, and a piston 23 is provided in the piston chamber 22. External power is introduced into the piston chamber 22 through a connecting hole 24, so that the piston 23 causes the valve cover cylinder 26 to move on the valve cover flange 20. A connecting rod 21 is provided on the valve cover flange 20. One end of the connecting rod 21 passes through the piston 23 and the valve cover cylinder 26 and is connected to a connecting member 25.

[0016] When it is necessary to replace the valve seat inside the pump body 1, external power is used to move the locked valve cover cylinder 26 downward. At this time, a gap is generated between the opposing surfaces of the valve cover cylinder 26 and the connecting piece 25 to facilitate the loosening of the connecting piece 25. Based on this, during the replacement of the valve seat, only the valve cover cylinder 26 needs to be removed without disassembling the pump body. Therefore, drilling operation efficiency can be improved, mud pump can be replaced quickly, and non-productive time can be reduced. The intensity of manual operation and safety risks are reduced, the equipment maintenance process is optimized, and the operation can be completed by a single person with hoisting tools, which greatly shortens the maintenance downtime.

[0017] The external power introduced by the connection hole 24 is gas, so as to use the gas source to drive the piston 23 to move the valve cover cylinder 26 downward.

[0018] Furthermore, the external power introduced through the connection hole 24 is hydraulic oil, which is used to drive the piston 23 to move the valve cover cylinder 26 downward.

[0019] Based on this, the device can use gas as a power source to move the valve cover cylinder 26 downward, or it can use hydraulic equipment to move the valve cover cylinder 26 downward by using hydraulic oil as a power source. Therefore, the self-locking mechanism has more power source sources, so that users can choose according to their actual needs.

[0020] Based on the above scheme, since there are multiple piston chambers 22, and these multiple piston chambers 22 are connected and communicated with each other through a medium channel 28. For example, there are four piston chambers 22, distributed at the four corners of the valve cover cylinder 26, which enables the valve cover cylinder 26 to move smoothly up and down.

[0021] To facilitate the disassembly of the self-locking assembly 2 and the pump body 1, since the valve cover flange 20 is movably mounted on the pump body 1, the entire self-locking mechanism and the pump body 1 have the advantage of easy disassembly.

[0022] Specifically, the valve cover flange 20 is also provided with a countersunk hole 27 and is connected to the pump body 1 by bolts passing through the countersunk hole 27, so as to fix the valve cover flange 20 on the pump body 1, thus making the disassembly and assembly of the valve cover flange 20 simple and convenient.

[0023] Based on the above scheme, one end of the connecting rod 21 is threadedly engaged with the valve cover flange 20, and the other end of the connecting rod 21 passes through the valve cover pressure cylinder 26 and is threadedly engaged with the inner wall surface of the connecting member 25. Furthermore, the outer wall surface of the connecting member 25 and the inner wall surface of the connecting member 25 are threadedly connected.

[0024] In summary, using a threaded connection for locking has two advantages: firstly, locking and unlocking can be accomplished by rotation, reducing the difficulty of locking the device; secondly, it facilitates the independent production and processing of the connecting rod 21 and the connecting piece 25, and also facilitates replacement with commonly used fasteners on the market, thereby reducing the maintenance cost of the device; specifically, the connecting rod 21 is preferably a double-ended screw, and the connecting piece 25 is preferably a nut.

[0025] Taking hydraulic oil as the power source as an example, the specific working principle of this device is as follows: When the external oil pump pumps the hydraulic oil into the piston chamber 22 through the connection hole 24, it pushes the valve cover cylinder 26 to move down; after the valve cover cylinder 26 moves down, the connecting piece 25 is tightened again to lock the valve cover cylinder 26. During disassembly, hydraulic oil is continuously pumped into the piston chamber 22 to create a gap between the upper surface of the valve cover cylinder 26 and the connector 25. Due to the gap, the connector 25 is not subjected to external force, so the connector 25 can be loosened relatively easily.

[0026] Based on this, the pump body does not need to be disassembled during the replacement process, improving drilling efficiency, enabling rapid replacement of mud pumps, reducing non-productive time, reducing the intensity of manual operation and safety risks, optimizing equipment maintenance processes, and allowing a single person to complete the operation with hoisting tools, significantly shortening maintenance downtime.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A self-locking mechanism, characterized in that: Includes a self-locking assembly (2), and the self-locking assembly (2) includes a valve cover flange (20) and a valve cover cylinder (26); The valve cover cylinder (26) is also provided with a piston chamber (22), and a piston (23) is provided in the piston chamber (22). External power is introduced into the piston chamber (22) through the provided connecting hole (24) so ​​that the piston (23) causes the valve cover cylinder (26) to move on the valve cover flange (20). The valve cover flange (20) is provided with a connecting rod (21), one end of which passes through the piston (23) and the valve cover cylinder (26) and is connected to the connecting piece (25).

2. The self-locking mechanism according to claim 1, characterized in that: The external power introduced through the connection hole (24) is gas, which is used to drive the piston (23) to move the valve cover cylinder (26) downward.

3. The self-locking mechanism according to claim 1, characterized in that: The external power introduced through the connection hole (24) is hydraulic oil, which is used to drive the piston (23) to move the valve cover cylinder (26) downward.

4. A self-locking mechanism according to claim 1, 2, or 3, characterized in that: The number of piston chambers (22) is multiple, and the multiple piston chambers (22) are connected and communicated with each other through a medium channel (28).

5. A self-locking mechanism according to claim 4, characterized in that: The valve cover flange (20) is movably mounted on the pump body (1).

6. A self-locking mechanism according to claim 5, characterized in that: The valve cover flange (20) is also provided with a countersunk hole (27), and is connected to the pump body (1) by bolts passing through the countersunk hole (27) to fix the valve cover flange (20) on the pump body (1).

7. A self-locking mechanism according to claim 6, characterized in that: One end of the connecting rod (21) is threaded into the valve cover flange (20), and the other end of the connecting rod (21) is threaded into the valve cover flange (20).

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