Sucker rod sealing structure

Abstract

The utility model discloses a sucker rod sealing structure, and relates to the technical field of pumping units. Comprising a polished rod, a sealing device body connected to the outer side of the bottom of the polished rod, an arc-shaped groove formed in the upper surface of the sealing device body and an outer cylinder distributed above the sealing device body. A positioning groove is formed in the top of an inner cavity of the outer cylinder, a sealing plug is distributed on the inner side of the outer cylinder, a fixing frame is fixedly arranged at the bottom of the sealing plug, a first spring is fixedly connected to the bottom of the fixing frame, a clamping structure is connected to the bottom of the first spring, and a movable groove is formed in an inner cavity of the fixing frame. Through the arrangement of the outer cylinder, the sealing plug, the sealing ring, the movable seat and other structures, the sucker rod can be better sealed when the sucker rod is not used, meanwhile, compared with an existing simple sealing mode through a sealing piece, the sealing effect can be improved, the sealing structure does not need to be replaced frequently, and the cost is reduced. The loss of the sealing structure is reduced, and the overall practicability is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pumping unit, in particular, relate to a sucker rod sealing structure. BACKGROUND

[0002] The sucker rod is an important component of the rod pump pumping unit. It is connected by coupling into the sucker rod string, the upper end is connected with the polished rod, and the lower end is connected with the deep well pump piston. The power of the pumping unit is transmitted to the deep well pump through the sucker rod, so that the piston of the deep well pump reciprocates, thereby pumping the underground oil to the ground. With the increasingly stringent environmental safety requirements of oilfields, great pressure is put on the on-site management of each production management area. In order to prevent leakage, the sucker rod sealing structure is used.

[0003] However, the existing sucker rod sealing structure is directly sealed by a sealing element when it is idle. However, such sealing method will cause the sealing element to be worn out after a long period of use, which not only affects the sealing effect, but also requires frequent replacement of the sealing element, and the overall sealing performance is poor. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a sucker rod sealing structure, which can effectively solve the problems of the prior art.

[0005] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0006] The utility model relates to a kind of sucker rod sealing structure, including polished rod, the sealing device main body connected to the outer side of polished rod bottom, the arc-shaped groove of the upper surface of sealing device main body is set, and the outer cylinder distributed above sealing device main body;

[0007] Further include: the inner cavity top of outer cylinder is provided with positioning slot, the inner side of outer cylinder is distributed with sealing plug, and the bottom of sealing plug is fixed with fixed frame, the bottom of fixed frame is fixedly connected with first spring, and the bottom of first spring is connected with clamping structure, the inner cavity of fixed frame is provided with movable slot, and the inner side of movable slot is distributed with extrusion plate, the side wall of extrusion plate is fixed with push block, and the top of push block is fixed with inserting rod, and the side, away from extrusion plate of push block, is fixedly connected with second spring.

[0008] Further, the clamping structure includes movable seat and arc-shaped plate, the movable seat is fixedly connected to the bottom of first spring, and the outer side of the bottom of first spring is fixed with arc-shaped plate.

[0009] Further, the arc-shaped grooves are equidistantly distributed along the top end middle part of sealing device main body, and the arc-shaped grooves and sealing device main body form an integrated structure.

[0010] Further, the hole diameter of the hole in the top end of the outer cylinder is matched with the outer diameter of the sealing plug, and the size of the groove in the bottom of the outer cylinder is matched with the outer diameter of the top end of the sealing device body.

[0011] Further, the positioning grooves are equidistantly distributed along the center point of the top end of the inner cavity of the outer cylinder, and the positioning grooves and the outer cylinder form an integrated structure.

[0012] Further, the arc-shaped plates are equidistantly distributed along the center point of the bottom of the movable seat, and the outer diameter of the arc-shaped plates is matched with the inner diameter of the arc-shaped groove.

[0013] The utility model has the following beneficial effects:

[0014] 1, the utility model discloses a outer cylinder, sealing plug, plug rod and extrusion board and other structure are set up, can better realize the sealing treatment of sucker rod when idle, compared with the simple sealing mode of the prior art through the sealing element, not only can improve the effect of sealing, and also need to realize the replacement of sealing structure frequently, reduce the loss of sealing structure, and the overall practicality is higher.

[0015] 2, the utility model discloses a arc-shaped plate and arc-shaped groove and other structure are set up, can conveniently realize the quick connection between movable seat and sealing device body subsequently, can improve the tightness of the connection between the two, and then can better play the effect of guiding and sealing. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0017] Figure 1 It is the schematic diagram of the utility model;

[0018] Figure 2 It is the side view schematic diagram of the sealing plug of the utility model;

[0019] Figure 3 It is the sectional schematic diagram of the outer cylinder of the utility model;

[0020] Figure 4 It is the sectional schematic diagram of the fixed frame of the utility model.

[0021] In the drawings, the component list represented by each sign is as follows:

[0022] 1, the polished rod; 2, sealing device main body; 3, arc slot; 4, outer tube; 5, positioning groove; 6, sealing plug; 7, fixed frame; 8, first spring; 9, movable seat; 10, arc plate; 11, movable slot; 12, extrusion plate; 13, push block; 14, plug; 15, second spring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0024] Please refer to Figures 1-4 As shown in the figure, the utility model discloses a sucker rod sealing structure, including the polished rod 1, the sealing device main body 2 of the outer side connection of the polished rod 1 bottom, the front end of the sealing device main body 2 and the sucker rod form threaded connection by the threaded connection mode, the upper surface of the sealing device main body 2 is set up arc slot 3, arc slot 3 is along the top end midpoint of the sealing device main body 2 equidistant distribution, and the outer tube 4 of the distribution above sealing device main body 2;

[0025] It further includes: the inner cavity top of outer tube 4 is set up positioning groove 5, positioning groove 5 is along the equidistant distribution of the inner cavity top of outer tube 4, and the inner diameter size of positioning groove 5 and the outer diameter size of plug 14 are adapted, and positioning groove 5 is obliquely distributed, and the inner side of outer tube 4 is distributed with sealing plug 6, and the bottom of sealing plug 6 is fixed with fixed frame 7, the bottom of fixed frame 7 is fixedly connected with first spring 8, and the bottom of first spring 8 is connected with the clamping structure, and the two ends of first spring 8 are fixedly connected to the bottom of fixed frame 7 and the top end of movable seat 9 respectively, the inner cavity of fixed frame 7 is set up movable slot 11, and the inner side of movable slot 11 is distributed with extrusion plate 12, the side wall of extrusion plate 12 is fixed with push block 13, and the top end of push block 13 is fixed with plug 14, and the second spring 15 is fixedly connected to the side of push block 13 away from extrusion plate 12;

[0026] When the entire structure is needed to seal the sucker rod, the outer cylinder 4 is longitudinally moved, and the outer cylinder 4 moves longitudinally along the polished rod 1 under the action of the force. When the outer cylinder 4 moves longitudinally, the sealing plug 6 and the fixed frame 7 are both sleeved outside one end of the polished rod 1, so that when the outer cylinder 4 moves to the appropriate position, the sealing plug 6 is input into the hole at the top end of the outer cylinder 4, and the fixed frame 7 drives the plug rod 14 to move longitudinally. At this time, the plug rod 14 is input into the inside of the positioning groove 5 under the action of the fixed frame 7, and since the positioning groove 5 and the plug rod 14 are both distributed in an inclined manner, when the plug rod 14 is input into the inside of the positioning groove 5, it moves transversely. Then, the plug rod 14 moves transversely to drive the push block 13 to move transversely. At this time, the push block 13 moves transversely to push the extrusion plate 12, so that the extrusion plate 12 transversely extrudes the bottom side wall of the sealing plug 6, so that the bottom of the sealing plug 6 is better attached to the polished rod 1. At the same time, the push block 13 moves transversely to pull the second spring 15, so that the second spring 15 is deformed, which facilitates the subsequent use of the reverse force generated by the deformation of the second spring 15 to assist the push block 13 to move transversely. At the same time, the longitudinal movement of the outer cylinder 4 pushes the movable seat 9, and at this time, the longitudinal movement of the movable seat 9 pulls the first spring 8 fixedly connected to the top end of the movable seat 9, so that the first spring 8 is deformed to generate a reverse force, which facilitates the subsequent assistance of the outer cylinder 4 to move longitudinally.

[0027] Further, the clamping structure comprises a movable seat 9 and an arc-shaped plate 10, the movable seat 9 is fixedly connected to the bottom of the first spring 8, and the arc-shaped plate 10 is fixedly arranged outside the bottom of the first spring 8, the arc-shaped plate 10 is equidistantly distributed along the center point of the bottom of the movable seat 9, and the outer diameter of the arc-shaped plate 10 is matched with the inner diameter of the arc-shaped groove 3;

[0028] When the movable seat 9 moves longitudinally under the action of the longitudinal movement of the outer cylinder 4, the arc-shaped plate 10 fixedly connected to the bottom of the movable seat 9 moves longitudinally, and then the arc-shaped plate 10 is input into the arc-shaped groove 3 at the top end of the sealing device main body 2, so that the sealing effect of the entire sealing structure can be improved, and the overall practicability is higher.

[0029] Further, the arc-shaped groove 3 is equidistantly distributed along the middle part of the top end of the sealing device main body 2, and the arc-shaped groove 3 and the sealing device main body 2 form an integrated structure.

[0030] When the number of arc-shaped grooves 3 is consistent with the number of arc-shaped plates 10, and the sizes of the arc-shaped grooves 3 and the arc-shaped plates 10 are matched, the stable clamping connection between the movable seat 9 and the sealing device main body 2 can be realized when the arc-shaped groove 3 is clamped with the arc-shaped plate 10 under the longitudinal movement of the movable seat 9, which facilitates the subsequent improvement of the sealing effect.

[0031] Further, the inner diameter of the hole at the top of the outer cylinder 4 is matched with the outer diameter of the sealing plug 6, and the size of the groove at the bottom of the outer cylinder 4 is matched with the outer diameter of the top of the sealing device body 2.

[0032] In operation, since the inner diameter of the hole at the top of the outer cylinder 4 is matched with the outer diameter of the sealing plug 6, when the outer cylinder 4 moves longitudinally along the polished rod 1, the sealing plug 6 is input into the opening at the top of the outer cylinder 4, and the sealing effect is further improved by the matching of the sizes, thereby improving the stability of the sealing. At the same time, the bottom of the outer cylinder 4 pushes the movable seat 9, thereby realizing the longitudinal movement of the movable seat 9.

[0033] Further, the positioning grooves 5 are equidistantly distributed along the center point of the top of the inner cavity of the outer cylinder 4, and the positioning grooves 5 and the outer cylinder 4 form an integrated structure.

[0034] In operation, when the outer cylinder 4 slides longitudally along the polished rod 1, one end of the insertion rod 14 is input into the inner side of the positioning groove 5, thereby realizing the clamping connection between the fixed frame 7 and the outer cylinder 4.

[0035] Further, the arc-shaped plates 10 are equidistantly distributed along the center point of the bottom of the movable seat 9, and the outer diameter of the arc-shaped plates 10 is matched with the inner diameter of the arc-shaped grooves 3.

[0036] In operation, since the number of the arc-shaped plates 10 is matched with the number of the arc-shaped grooves 3, and the outer diameter of the arc-shaped plates 10 is matched with the inner diameter of the arc-shaped grooves 3, when the arc-shaped plates 10 are input into the inner side of the arc-shaped grooves 3, the clamping connection between the movable seat 9 and the sealing device body 2 is facilitated.

[0037] Working principle: first, the sealing device body 2 is connected with the front end of the sucker rod through threaded connection, the outer cylinder 4 is moved longitudinally, at this time the outer cylinder 4 will move longitudinally along the polished rod 1 under the action of force, the sealing plug 6 is input into the hole at the top of the outer cylinder 4 when the outer cylinder 4 moves longitudinally, the fixed frame 7 drives the insertion rod 14 to move, so that it is input into the inside of the positioning groove 5, the insertion rod 14 is input into the inside of the positioning groove 5 and moves transversely, then the insertion rod 14 moves transversely and drives the push block 13 to move transversely, at this time the push block 13 moves transversely and pushes the extrusion plate 12, so that the extrusion plate 12 transversely extrudes the bottom side wall of the sealing plug 6, so that the bottom of the sealing plug 6 is better adhered to the polished rod 1, at the same time, the push block 13 moves transversely and pulls the second spring 15, so that the second spring 15 is deformed, which is convenient for subsequent use of the reverse force generated by the deformation of the second spring 15 to assist the push block 13 to move transversely, at the same time, finally the outer cylinder 4 moves longitudinally and pushes the movable seat 9, at this time the movable seat 9 moves longitudinally and pulls the first spring 8 fixedly connected at the top, so that the first spring 8 is deformed and generates a reverse force, which is convenient for subsequent assistance of the outer cylinder 4 to move longitudinally, and since the outer diameter of the movable seat 9 is matched with the diameter of the groove at the bottom of the outer cylinder 4, the movable seat 9 moves longitudinally under the action of the outer cylinder 4, at this time the movable seat 9 moves longitudinally and drives the arc plate 10 fixedly connected at the bottom to move longitudinally, so that the arc plate 10 is input into the arc groove 3 at the top of the sealing device body 2, thereby the sealing effect of the whole sealing structure can be improved, and the overall practicability is higher.

[0038] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement of the technical scheme recorded in the foregoing embodiments, belongs to the protection scope of the present application.

Claims

1. A sucker rod sealing structure, comprising a polished rod (1), a sealing device body (2) connected to the outside of the bottom of the polished rod (1), an arc-shaped groove (3) formed on the upper surface of the sealing device body (2), and an outer cylinder (4) distributed above the sealing device body (2). characterized in that Further comprising: a positioning groove (5) formed on the top of the inner cavity of the outer cylinder (4), a sealing plug (6) distributed on the inner side of the outer cylinder (4), a fixed frame (7) fixedly arranged on the bottom of the sealing plug (6), a first spring (8) fixedly connected to the bottom of the fixed frame (7), a clamping structure connected to the bottom of the first spring (8), a movable groove (11) formed in the inner cavity of the fixed frame (7), an extrusion plate (12) distributed on the inner side of the movable groove (11), a push block (13) fixedly arranged on the side wall of the extrusion plate (12), an insertion rod (14) fixedly arranged on the top end of the push block (13), and a second spring (15) fixedly connected to the side of the push block (13) away from the extrusion plate (12).

2. A sucker rod seal structure according to claim 1, wherein The clamping structure comprises a movable seat (9) and an arc-shaped plate (10), the movable seat (9) is fixedly connected to the bottom of the first spring (8), and the arc-shaped plate (10) is fixedly arranged on the outside of the bottom of the first spring (8).

3. A rod seal structure as defined in claim 1, wherein The arc-shaped grooves (3) are equidistantly distributed along the middle part of the top end of the sealing device body (2), and the arc-shaped grooves (3) and the sealing device body (2) form an integrated structure.

4. A rod seal structure as defined in claim 1, wherein The inner diameter of the hole formed on the top end of the outer cylinder (4) is adapted to the outer diameter of the sealing plug (6), and the size of the groove formed on the bottom of the outer cylinder (4) is adapted to the outer diameter of the top end of the sealing device body (2).

5. A rod seal structure as defined in claim 1, wherein The positioning grooves (5) are equidistantly distributed along the center point of the top of the inner cavity of the outer cylinder (4), and the positioning grooves (5) and the outer cylinder (4) form an integrated structure.

6. A rod seal structure as defined in claim 2, wherein The arc-shaped plates (10) are equidistantly distributed along the center point of the bottom of the movable seat (9), and the outer diameter of the arc-shaped plates (10) is adapted to the inner diameter of the arc-shaped grooves (3).

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