Maintenance device for mechanical extraction air pump rod

Abstract

The invention discloses a maintenance device for a mechanical extraction air pump rod, and relates to the technical field of mineral mining, the maintenance device is characterized by comprising an inner sleeve and an outer sleeve arranged on the periphery of the inner sleeve, a mounting cavity is formed between the inner sleeve and the outer sleeve, and the inner sleeve and the outer sleeve are connected through connecting ring plates at the upper end and the lower end; an upper cleaning mechanism and a lower cleaning mechanism which alternately work are arranged in the inner sleeve; the cleaning mechanism comprises a plurality of groups of cleaning arms which are uniformly distributed and hinged to the inner wall of the inner sleeve, and each cleaning arm comprises a rotating rod and a rubber clamping plate hinged to one end of the rotating rod; and a wheel control mechanism for controlling the cleaning arms in the two groups of cleaning mechanisms to alternately clamp the pump rod is arranged in the mounting cavity. The pump rod is sleeved with the device for use, the two cleaning assemblies which are arranged at the upper end and can alternately clean the surface of the pump rod are utilized, the device can slide in a reciprocating mode along the whole body of the pump rod in the reciprocating motion process of the pump rod, impurities on the surface of the pump rod are continuously cleaned, and the stable working condition operation state of the pump rod is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mineral mining, and in particular to a machine extraction gas pump rod maintenance device. Background Art

[0002] The mechanical pumping and drainage process is a process commonly used in shale gas extraction operations. During the shale gas extraction process, a large amount of water may accumulate inside the gas well. In order to increase the gas well production, the accumulated water inside needs to be pumped out. At this time, the donkey head machine is required to connect the plunger through the pump rod to make reciprocating motion in the wellbore, so as to pump out the accumulated water inside. This process is similar to the principle of a water pressure well. When the water in the wellbore is pumped out, the accumulated water may carry a large amount of impurities. These impurities will gradually adhere to the pump rod as they rise, thereby increasing the deadweight of the pump rod and its resistance in the liquid, which will cause the pump rod to work poorly under high reciprocating cycles and reduce the stability of the rod column system.

[0003] In view of this, a design or technical improvement is now proposed to solve the above problems.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a maintenance device for a pump rod of a mechanical extraction gas pump.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A maintenance device for a pump rod of a gas extraction machine comprises an inner sleeve and an outer sleeve arranged on the periphery of the inner sleeve, wherein an installation chamber is formed between the inner sleeve and the outer sleeve, and the two are connected by connecting ring plates at upper and lower ends; the interior of the inner sleeve is provided with two groups of cleaning mechanisms working alternately, which are used to remove impurities on the surface of the pump rod when the pump rod reciprocates; the cleaning mechanism comprises a plurality of groups of cleaning arms evenly hingedly arranged on the inner wall of the inner sleeve, wherein the cleaning arm comprises a rotating rod and a rubber splint hingedly arranged at one end of the rotating rod; the rotating rod is hingedly connected to a mounting frame arranged on the inner wall of the inner sleeve, and when the rubber splint is clamped on the outer surface of the pump rod, the rotating rod is in an inclined state; a wheel control mechanism is arranged in the installation chamber to control the cleaning arms in the two groups of cleaning mechanisms to alternately clamp the pump rod.

[0008] Furthermore, a limit assembly is provided on the inner sleeve, and the clamping surface of the limit rubber splint is always kept parallel to the outer surface of the pump rod; the limit assembly includes a movable block that slides up and down in an installation groove evenly opened on the inner sleeve, and a connecting rod that is movably connected in the movable block and the end of which is connected to the back side of the rubber splint; first limit sliding grooves are opened on both sides of the installation groove, and first limit sliding blocks that are clamped and slid in the first limit sliding grooves are provided on both sides of the movable block.

[0009] Furthermore, a first spring is arranged between the movable block and the inner wall of the mounting groove, and the first spring clamps the rubber clamp plate and the outer surface of the pump rod in a non-deformed state.

[0010] Furthermore, the wheel control mechanism includes two sets of locking components for respectively controlling the opening of the cleaning arms in the two cleaning mechanisms and a trigger component for synchronously controlling the two sets of locking components to alternately lock and release the cleaning arms in the two cleaning mechanisms.

[0011] Furthermore, the locking assembly includes a rear block arranged at one end of the movable block away from the rubber splint, a limiting sleeve evenly arranged on the outer surface of the inner sleeve, and a trigger rod that is connected to the limiting sleeve and is movable up and down; hooks are arranged at the upper and lower ends of the trigger rod, a notch is provided on the side of the rear block close to the trigger rod, a first wedge surface that is adapted to abut against the hook is provided in the notch, and a slot that is adapted to abut against the hook is provided on the side of the first wedge surface away from the trigger rod.

[0012] Furthermore, the trigger assembly includes a connecting frame arranged on the upper and lower sides of the trigger rod, a mounting sleeve arranged on the connecting frame, a feedback rod that can move up and down in a second limiting groove opened on the mounting sleeve and is movably connected with the connecting ring plate, and a side push rod arranged on the feedback rod; a third limiting groove is opened at the side end of the second limiting groove for limiting the sliding of the side push rod; a second spring is arranged between the feedback rod and the inner wall of the second limiting groove; and a second wedge-shaped surface that is adapted to abut against the side push rod is arranged at one end of the rear block close to the side push rod.

[0013] Furthermore, a third spring sleeved on the linkage rod is provided between the rear block and the movable block.

[0014] Furthermore, fourth limiting sliding grooves are provided on both sides of the mounting sleeve, a retaining frame is provided on the inner sleeve, and a second limiting sliding block is provided on the retaining frame and is slidably engaged in the fourth limiting sliding grooves.

[0015] Furthermore, the feedback rods located on the same side of the inner sleeve are commonly connected with a feedback ring plate.

[0016] Furthermore, the mounting frame is hinged at a middle position of the rotating rod, and a limiting block for overlapping an end of the rotating rod away from the rubber splint is arranged in the inner sleeve, wherein the limiting block is made of rubber.

[0017] Compared with the prior art, the beneficial effect of the present solution is as follows: the present invention is used by being sleeved on the pump rod, and utilizing two groups of cleaning components arranged on its upper end that can alternately clean the surface of the pump rod, so that the device can slide back and forth along the entire body of the pump rod during the reciprocating motion of the pump rod, thereby continuously cleaning impurities on its surface and ensuring the stable operating state of the pump rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the use status of an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional perspective schematic diagram of an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of the installation chamber in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the cross-sectional structure of the inner sleeve in an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of an inner sleeve in an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of the coordination between the cleaning mechanism and the wheel control mechanism in an embodiment of the present invention;

[0025] Figure 7 is a partial structural schematic diagram of a wheel control mechanism in an embodiment of the present invention;

[0026] Figure 8 is a disassembly diagram of the mounting sleeve and the feedback rod in the embodiment of the present invention;

[0027] Fig. 9 is a schematic structural diagram of a position limiting assembly in an embodiment of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the post-block in an embodiment of the present invention.

[0029] In the figure: 1, inner sleeve; 11, outer sleeve; 12, installation chamber; 13, connecting ring plate; 2, cleaning arm; 21, rotating rod; 22, rubber splint; 23, mounting frame; 3, mounting groove; 31, movable block; 32, connecting rod; 33, first limit slide groove; 34, first limit slider; 35, first spring; 4, rear block; 41, limit slide sleeve; 42, trigger rod; 43, hook; 44, notch; 45, first wedge surface; 46, slot; 5, connecting frame; 51, mounting sleeve; 52, second limit slide groove; 53, feedback rod; 54, side push rod; 55, third limit slide groove; 56, second spring; 57, second wedge surface; 6, third spring; 7, fourth limit slide groove; 71, retaining frame; 72, second limit slider; 8, feedback ring plate; 9, limit block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] like Figure 1-10The mechanical extraction gas pump rod maintenance device shown is used in shale gas extraction operations, including an inner casing 1 and an outer casing 11 arranged on the periphery of the inner casing 1, wherein an installation chamber 12 is formed between the inner casing 1 and the outer casing 11, and the two are connected by connecting ring plates 13 at the upper and lower ends; the inner casing 1 is provided with two groups of cleaning mechanisms that work alternately in an upper and lower manner, which are used to remove impurities on the surface of the pump rod when the pump rod reciprocates; the cleaning mechanism includes a plurality of cleaning arms 2 that are evenly hingedly arranged on the inner wall of the inner casing 1, wherein the cleaning arm 2 includes a rotating rod 21 and a rubber clamping plate 22 hingedly arranged at one end of the rotating rod 21; the rotating rod 21 and the mounting bracket 23 arranged on the inner wall of the inner casing 1 The pump rod 21 is hinged, and when the rubber clamping plate 22 is clamped on the outer surface of the pump rod, the rotating rod 21 is in an inclined state; a wheel control mechanism is arranged in the installation chamber 12 to control the cleaning arms 2 in the two groups of cleaning mechanisms to alternately clamp the pump rod. The device is sleeved on the pump rod for use, and its main working process is to clean the impurities on the outer surface of the pump rod through the alternate work of the cleaning mechanism arranged inside it. When the pump rod reciprocates, the rotating rod 21 in one group of cleaning mechanisms will be clamped on the outer surface of the pump rod, and then cooperate with the pressure of the water flow to make the device drive the rotating rod 21 to slide against the surface of the pump rod, thereby scraping off the impurities on its surface, and the arrangement of the rotating rod 21 makes the device When it moves to the end of the pump rod, it can only move unidirectionally along the pump rod. Specifically, when the pump rod reciprocates, the water flow inside it will apply water pressure in the opposite direction of the pump rod's movement, thereby applying pressure to the device. When the pressure is opposite to the rotation direction of the rubber splint 22 clamped on the surface of the pump rod away from the pump rod, the rubber splint 22 will have a tendency to move away from the surface of the pump rod under the push of the water pressure, thereby causing sliding friction with the surface of the pump rod. At this time, the device slides in the direction opposite to the movement of the pump rod, thereby cleaning the impurities on the surface of the pump rod with the sliding friction. When the water pressure is the same as the rotation direction of the rubber splint 22 clamped on the surface of the pump rod away from the pump rod, the rubber splint 22 will have a tendency to move away from the surface of the pump rod under the push of the water pressure. 2 will have a tendency to rotate toward the surface side of the pump rod, making the clamping between it and the pump rod tighter, and then the device will move synchronously with the pump rod, and its relative position remains unchanged, so that during the periodic reciprocating motion of the pump rod, the device will gradually slide unidirectionally on the pump rod until it slides to the end of the pump rod. When it slides to the end, the wheel control mechanism will control the cleaning mechanism to rotate. At this time, the rubber splint 22 in the reverse clamping state with the rubber splint 22 that previously cleaned the pump rod begins to clamp the pump rod, while the rubber splint 22 in the other group of cleaning mechanisms releases the clamping, and then during the reciprocating motion of the pump rod, the device begins to slide and crawl in the direction, thereby implementing the back movement cleaning operation.

[0032] In one embodiment, a limiting assembly is provided on the inner sleeve 1, and the clamping surface of the limiting rubber clamping plate 22 is always kept parallel to the outer surface of the pump rod; the limiting assembly includes a movable block 31 that slides up and down in the mounting groove 3 evenly arranged on the inner sleeve 1, and a connecting rod 32 that is movably connected in the movable block 31 and the end of which is connected to the back of the rubber clamping plate 22; first limiting sliding grooves 33 are provided on both sides of the mounting groove 3, and first limiting sliding blocks 34 that slide in the first limiting sliding grooves 33 are provided on both sides of the movable block 31, and the connecting rod 32 and the rubber clamping plate 22 are in a vertical state. When the rubber clamping plate 22 rotates under the drive of the rotating rod 21, the connecting rod 32 will synchronously slide horizontally in the movable block 31, and the movable block 31 will synchronously slide vertically with the rubber clamping plate 22. The two cooperate to limit the rubber clamping plate 22, so that the rubber clamping plate 22 maintains a state parallel to the pump rod for clamping movement, so that it can firmly clamp the surface of the pump rod when clamping.

[0033] In one embodiment, a first spring 35 is provided between the movable block 31 and the inner wall of the mounting groove 3. Through the provision of the first spring 35, the rubber clamp 22 is in a clamped state with the outer surface of the pump rod in the initial state. When the rubber clamp 22 is away from the pump rod, the first spring 35 will shrink and deform under the sliding of the movable block 31, thereby achieving the effect of automatically clamping and resetting the rubber clamp 22.

[0034] In one embodiment, the wheel control mechanism includes two sets of locking components that respectively control the opening of the cleaning arms 2 in the two cleaning mechanisms and a trigger component that synchronously controls the two sets of locking components to alternately lock and release the cleaning arms 2 in the two cleaning mechanisms. The locking components are used to lock the rubber clamp 22 when the rubber clamp 22 rotates away from the outer surface of the pump rod so that it does not contact the pump rod. When the trigger component triggers the locking component, one set of locking components controls the opening of the rubber clamp 22 in one cleaning mechanism, and the other set of locking components controls the release of the rubber clamp 22 in the other cleaning mechanism, thereby achieving the operating effect of the rubber clamp 22 in the two cleaning mechanisms alternately clamping and cleaning the pump rod.

[0035] In one embodiment, the locking assembly includes a rear block 4 arranged at one end of the movable block 31 away from the rubber splint 22, a limit sleeve 41 evenly arranged on the outer surface of the inner sleeve 1, and a trigger rod 42 that is connected to the limit sleeve 41 and moves up and down. The trigger rod 42 is provided with hooks 43 at the upper and lower ends, and a notch 44 is provided on the side of the rear block 4 close to the trigger rod 42. A first wedge surface 45 that is adapted to abut against the hook 43 is provided in the notch 44. A slot 46 that is adapted to abut against the hook 43 is provided on the side of the first wedge surface 45 away from the trigger rod 42. When the trigger rod 42 moves to one side of the rear block 4, it will abut against the The trigger rod 42 is engaged with the first wedge-shaped surface 45 inside the rear block 4, and then abuts against the rear block 4 to move in a direction parallel to the trigger rod 42. At the same time, the trigger rod 42 also abuts against the first wedge-shaped surface 45 to make the rear block 4 move in a direction perpendicular to the trigger rod 42. Then the rear block 4 drives the rubber clamping plate 22 to move synchronously through the connecting rod 32, so that the rubber clamping plate 22 rotates away from the pump rod. When the trigger rod 42 slides to be misaligned with the first wedge-shaped surface 45, the hook 43 at its upper end is buckled in the slot 46, thereby limiting the rear block 4, thereby controlling the rubber clamping plate 22 to be limited and locked after it moves away from the pump rod.

[0036] In one embodiment, the trigger assembly includes a connecting frame 5 arranged on the upper and lower sides of the trigger rod 42, a mounting sleeve 51 arranged on the connecting frame 5, a feedback rod 53 that moves in a second limiting slot 52 opened on the mounting sleeve 51 and is movably connected with the connecting ring plate 13, and a side push rod 54 arranged on the feedback rod 53; a third limiting slot 55 for the side push rod 54 to slide in a limited manner is opened at the side end of the second limiting slot 52; a second spring 56 is arranged between the feedback rod 53 and the inner wall of the second limiting slot 52; the rear block 4 is close to One end of the side push rod 54 is provided with a second wedge-shaped surface 57 adapted to abut against the side push rod 54, and a third spring 6 sleeved on the linkage rod 32 is provided between the rear block 4 and the movable block 31. When the locking assembly limits the rubber clamp 22, the third spring 6 is in a stretched deformation state. When the device moves to one end of the pump rod, the feedback rod 53 on the corresponding side will abut against the inner wall of the gas production pipeline, thereby causing it to move in a direction opposite to the moving direction of the device, thereby driving the side push rod 54 to move synchronously, and the second spring 56 is compressed and stored. The push rod 54 is in contact with the second wedge-shaped surface 57 at the upper end of the rear block 4, thereby pushing the rear block 4 to continue sliding along the side away from the inner sleeve 1, so that the hook 43 on the trigger rod 42 is disengaged from the slot 46. At this time, the second spring 56 is compressed to the limit, and the feedback rod 53 drives the mounting sleeve 51 to move synchronously. The mounting sleeve 51 drives the trigger rod 42 to move to the opposite side through the connecting frame 5, so that the hook 43 at its end begins to move away from the previously buckled rear block 4, and the rear block 4 is restored under the rebound action of the third spring 6. The rubber clamp 22 is then pushed toward the pump rod side through the linkage rod 32, and the movable block 31 is pushed back to its original position by the first spring 35, so that the rubber clamp 22 is released and clamped on the surface of the pump rod. At this time, under the push of the feedback rod 53, the trigger rod 42 will follow the feedback rod 53 to slide to engage with the rear block 4 on the other side, and then push the rear block 4 to drive the correspondingly connected rubber clamp 22 to open the clamping of the pump rod, thereby realizing the operation effect of alternately controlling the clamping of the pump rod by the rubber clamp 22 in the two groups of cleaning components.

[0037] In one embodiment, fourth limiting grooves 7 are provided on both sides of the mounting sleeve 51, a retaining frame 71 is provided on the inner sleeve 1, and a second limiting slider 72 is provided on the retaining frame 71 and is slidably engaged in the fourth limiting groove 7, thereby ensuring that the up and down sliding of the mounting sleeve 51 is more stable and the coordination between the structures is more stable.

[0038] In one embodiment, the feedback rods 53 located on the same side of the inner sleeve 1 are commonly connected to a feedback ring plate 8. Through the setting of the feedback ring plate 8, when the device moves to one end of the pump rod, the feedback rods 53 located on the same side of the inner sleeve 1 can be triggered at the same time, thereby ensuring that the multiple groups of rubber clamps 22 in the cleaning component can maintain synchronous clamping and move away from the activity, thereby ensuring the working stability of the structure.

[0039] In one embodiment, the mounting frame 23 is hinged at the middle position of the rotating rod 21, and a limiting block 9 is provided in the inner sleeve 1 for overlapping the end of the rotating rod 21 away from the rubber clamp 22, wherein the limiting block 9 is made of rubber. Through the setting of the limiting block 9, the rotating rod 21 drives the rubber clamp 22 to rotate to a certain position and then will be limited, thereby preventing the rubber clamp 22 from being clamped too tightly with the pump rod and causing excessive deformation of itself.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A machine extraction gas pump rod maintenance device, characterized in that: It comprises an inner sleeve (1) and an outer sleeve (11) arranged on the periphery of the inner sleeve (1), wherein an installation chamber (12) is formed between the inner sleeve (1) and the outer sleeve (11), and the two are connected via connecting ring plates (13) at upper and lower ends; The inner sleeve (1) is provided with two groups of cleaning mechanisms working alternately, one above the other, for cleaning impurities on the surface of the pump rod when the pump rod is in a reciprocating motion state; The cleaning mechanism comprises a plurality of cleaning arms (2) evenly distributed and hingedly arranged on the inner wall of the inner sleeve (1), wherein the cleaning arms (2) comprise a rotating rod (21) and a rubber clamping plate (22) hingedly arranged at one end of the rotating rod (21); The rotating rod (21) is hingedly connected to a mounting frame (23) arranged on the inner wall of the inner sleeve (1), and when the rubber clamping plate (22) is clamped on the outer surface of the pump rod, the rotating rod (21) is in an inclined state; A wheel control mechanism for controlling the cleaning arms (2) in the two groups of cleaning mechanisms to alternately clamp the pump rod is arranged in the installation chamber (12).

2. The mechanical extraction gas pump rod maintenance device according to claim 1, characterized in that: The inner sleeve (1) is provided with a limiting component whose clamping surface of a limiting rubber clamp (22) is always kept parallel to the outer surface of the pump rod; The limit assembly comprises a movable block (31) which slides up and down in a mounting groove (3) evenly arranged on the inner sleeve (1), and a linkage rod (32) which is movably connected to the movable block (31) and has an end connected to the back of the rubber clamp (22); First limiting sliding grooves (33) are provided on both sides of the installation groove (3), and first limiting sliding blocks (34) are provided on both sides of the movable block (31) and are engaged and slided in the first limiting sliding grooves (33).

3. The mechanical extraction gas pump rod maintenance device according to claim 2, characterized in that: A first spring (35) is arranged between the movable block (31) and the inner wall of the mounting groove (3), and the first spring (35) clamps the rubber clamping plate (22) and the outer surface of the pump rod in a non-deformed state.

4. The machine extraction gas pump rod maintenance device according to claim 2 or 3, characterized in that: The wheel control mechanism comprises two sets of locking components which respectively control the opening of the cleaning arms (2) in the two sets of cleaning mechanisms, and a trigger component which synchronously controls the two sets of locking components to alternately lock and release the cleaning arms (2) in the two sets of cleaning mechanisms.

5. The mechanical extraction gas pump rod maintenance device according to claim 4, characterized in that: The locking assembly comprises a rear block (4) arranged at one end of the movable block (31) away from the rubber clamp (22), a limiting sliding sleeve (41) evenly arranged on the outer surface of the inner sleeve (1), and a trigger rod (42) inserted into the limiting sliding sleeve (41) and movable in an upward and downward limiting manner; The trigger rod (42) is provided with hooks (43) at both ends, and a notch (44) is provided on a side of the rear block (4) close to the trigger rod (42). A first wedge-shaped surface (45) adapted to abut against the hook (43) is provided in the notch (44). A slot (46) adapted to abut against the hook (43) is provided on a side of the first wedge-shaped surface (45) away from the trigger rod (42).

6. The mechanical extraction gas pump rod maintenance device according to claim 5, characterized in that: The trigger assembly comprises a connecting frame (5) arranged on upper and lower sides of the trigger rod (42), a mounting sleeve (51) arranged on the connecting frame (5), a feedback rod (53) movable in upper and lower limiting positions in a second limiting sliding groove (52) provided on the mounting sleeve (51) and movably connected to the connecting ring plate (13), and a side push rod (54) arranged on the feedback rod (53); A third limiting sliding groove (55) for limiting sliding of the side push rod (54) is provided at the side end of the second limiting sliding groove (52); A second spring (56) is provided between the feedback rod (53) and the inner wall of the second limiting sliding groove (52); One end of the rear block (4) close to the side push rod (54) is provided with a second wedge-shaped surface (57) adapted to abut against the side push rod (54).

7. The mechanical extraction gas pump rod maintenance device according to claim 6, characterized in that: A third spring (6) sleeved on a linkage rod (32) is provided between the rear block (4) and the movable block (31).

8. The mechanical extraction gas pump rod maintenance device according to claim 6, characterized in that: Fourth limiting sliding grooves (7) are provided on both sides of the installation sleeve (51), a retaining frame (71) is provided on the inner sleeve (1), and a second limiting sliding block (72) is provided on the retaining frame (71) and is slidably engaged in the fourth limiting sliding groove (7).

9. The mechanical extraction gas pump rod maintenance device according to claim 7, characterized in that: The feedback rods (53) located on the same side of the inner sleeve (1) are commonly connected to a feedback ring plate (8).

10. The mechanical extraction gas pump rod maintenance device according to claim 2, characterized in that: The mounting frame (23) is hinged at the middle position of the rotating rod (21), and a limiting block (9) is arranged in the inner sleeve (1) for overlapping the end of the rotating rod (21) away from the rubber clamp (22), wherein the limiting block (9) is made of rubber.

Images