CN111173471A

CN111173471A - Polish rod sealer

Info

Publication number: CN111173471A
Application number: CN202010105771.2A
Authority: CN
Inventors: 孙洪荣
Original assignee: Jiangsu Sanshui Enterprise Incubator Co ltd
Current assignee: Jiangsu Sanshui Enterprise Incubator Co ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-05-19

Abstract

The invention discloses a polish rod sealer in the technical field of polish rod sealers, which comprises a packing box, wherein a polish rod is arranged in the packing box, an upper backing ring, sealing filler and a lower backing ring are sequentially arranged in a containing cavity from top to bottom, a pressing sleeve is arranged at the top of the upper backing ring, a pressing cap is arranged at the top of the packing box, adjusting bolts are arranged on the left side and the right side of the top of the pressing cap, a fixing sleeve is arranged at the bottom of the packing box, four groups of adjusting screws with the same structure are uniformly inserted into the fixing sleeve, balls are arranged on one sides of the four groups of adjusting screws close to the polish rod, the polish rod sealer presses the pressing cap by screwing the pressing cap to enable the pressing cap to move downwards on the packing box to extrude the pressing sleeve, so that the sealing filler is subjected to pressure and expand in the horizontal direction, the sealing filler can be attached to the outer wall of the polish rod, thereby realizing sealing, further extrude the pressing sleeve, improve the leakproofness of polished rod sealing ware.

Description

Polish rod sealer

Technical Field

The invention relates to the technical field of polish rod sealers, in particular to a polish rod sealer.

Background

In the process of oil exploitation, an underground oil pump is driven by an underground oil pumping device through a polish rod and an oil pumping rod to work so as to pump underground crude oil to the ground, in the process of oil pumping, the polish rod continuously reciprocates up and down at a wellhead, and in order to keep the sealing of an annular space between the polish rod and an oil pipe and prevent the crude oil from leaking outwards, a polish rod sealer is usually arranged at the wellhead. Due to the influences of multiple factors such as underground working condition factors, manufacturing accuracy of pumping equipment, deformation of parts of the pumping equipment after bearing load and the like, the axis of the polished rod and the axis of the polished rod sealer are likely to deviate, and the polished rod is accompanied by horizontal displacement (namely swinging) in a certain direction in the up-and-down reciprocating motion process, so that the contact surface between the sealing ring and the polished rod is stressed unevenly, the surface with large stress in the sealing ring is worn quickly, the service life of the sealing ring is shortened, and the sealing performance of the polished rod sealer is reduced, so that the polished rod sealer is provided.

Disclosure of Invention

The present invention is directed to a polish rod sealer to solve the above-mentioned problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a polished rod sealer, includes the packing box, be equipped with the polished rod in the packing box, and form between packing box and the polished rod and hold the chamber, it sets gradually backing ring, sealing filler and backing ring down from the top down to hold the intracavity, the top installation of going up the backing ring is pressed the cover, the cap is pressed in the top installation of packing box, and presses the cap to be located the top of pressing the cover, press the top left and right sides of cap and all install adjusting bolt, the fixed cover of bottom installation of packing box, the fixed adjusting screw who evenly pegs graft four groups of structures the same that sheathes in, four groups adjusting screw is close to one side of polished rod and all installs the ball.

Preferably, the adjusting screw is provided with a sliding clamping groove matched with the ball, and the opening diameter of the sliding clamping groove is smaller than the diameter of the ball.

Preferably, the packing box and the pressure cap are in threaded connection, the outer wall of the top of the packing box is provided with an external thread, and the inner wall of the pressure cap is provided with an internal thread.

Preferably, the sealing packing is a packing, and the cross section of the sealing packing is rectangular.

Preferably, the adjusting screw comprises a threaded rod screwed on the fixing sleeve, a handle is installed on one side, away from the ball, of the threaded rod, and an anti-skidding sleeve is installed on the handle.

Preferably, the upper backing ring and the lower backing ring are both metal backing rings, and bosses are mounted at the bottom of the upper backing ring and the top of the lower backing ring.

Compared with the prior art, the invention has the beneficial effects that:

1. this polish rod sealing device presses the cap through screwing up, makes to press the cap to remove the extrusion downwards on the packing box and presses the cover to make sealing filler receive pressure, carry out the inflation of horizontal direction, make sealing filler can hug closely with the outer wall of polish rod, thereby realize sealedly, can also push adjusting bolt through twisting simultaneously, further extrudeing pressing the cover, improve polish rod sealing device's leakproofness.

2. This polish rod sealer still is provided with fixed cover, adjusting screw and ball, is favorable to making four group's balls can contact with the outer wall of polish rod, carries on spacingly to the polish rod, prevents the polish rod skew, and long-time skew is rotatory to the wearing and tearing that sealing filler caused inhomogeneous, has reduced sealing filler's life, is favorable to improving polish rod sealer's leakproofness.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the fixing sleeve structure of the present invention;

fig. 3 is a schematic view of an adjusting screw according to the present invention.

In the figure: the packing box comprises a packing box 1, a polish rod 2, a holding cavity 3, an upper backing ring 4, a sealing filler 5, a lower backing ring 6, a pressing sleeve 7, a pressing cap 8, an adjusting bolt 9, a fixing sleeve 10, an adjusting screw rod 11, a threaded rod 111, a handle 112 and a ball 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a polished rod sealer, including packing box 1, be equipped with polished rod 2 in the packing box 1, and form between packing box 1 and the polished rod 2 and hold chamber 3, from the top down sets gradually backing ring 4 in holding chamber 3, packings 5 and lower backing ring 6, the top installation of going up backing ring 4 presses cover 7, cap 8 is pressed in the top installation of packing box 1, and press cap 8 to be located the top of pressing cover 7, adjust bolt 9 is all installed to the top left and right sides of pressing cap 8, the fixed cover 10 of bottom installation of packing box 1, the same adjusting screw 11 of four group structures of evenly pegging graft on the fixed cover 10, ball 12 is all installed to one side that four group adjusting screw 11 are close to polished rod 2.

The adjusting screw 11 is provided with a sliding clamping groove matched with the ball 12, and the opening diameter of the sliding clamping groove is smaller than the diameter of the ball 12, so that the ball 12 can better roll in the sliding clamping groove and cannot fall off, meanwhile, the polished rod 2 can be limited, the offset is prevented, the abrasion of the sealing filler 5 due to long-time offset rotation is not uniform, and the service life of the sealing filler 5 is shortened;

the packing box 1 is in threaded connection with the pressing cap 8, the outer wall of the top of the packing box 1 is provided with an external thread, the inner wall of the pressing cap 8 is provided with an internal thread, and the pressing cap 8 is screwed to move downwards to extrude the pressing sleeve 7, so that the sealing filler 5 is expanded in the horizontal direction under the action of pressure, and the sealing filler 5 can be tightly attached to the outer wall of the polished rod 2, and sealing is realized;

the sealing packing 5 is a packing, the section of the sealing packing 5 is rectangular, a small gap exists between the packing and the polish rod 2, and a medium is intercepted in a labyrinth for many times like a labyrinth, so that the sealing effect is achieved;

the adjusting screw 11 comprises a threaded rod 111 screwed on the fixed sleeve 10, a handle 112 is arranged on one side of the threaded rod 111 far away from the ball 12, and an anti-skid sleeve is arranged on the handle 112, so that the threaded rod 111 can be better adjusted through the handle 112, and the polished rod 2 is prevented from deviating and the sealing filler 5 is prevented from being abraded unevenly due to long-time deviation and rotation;

go up backing ring 4 and lower backing ring 6 and be the metal backing ring, and the boss is all installed to the bottom of going up backing ring 4 and the top of lower backing ring 6, is favorable to better extrudeing gland packing 5 through the boss.

The working principle is as follows: pressing cap 8 through screwing up, make and press cap 8 to remove the extrusion downwards on packing box 1 and press cover 7, thereby make gland packing 5 receive pressure, carry out the inflation of horizontal direction, make gland packing 5 hug closely with the outer wall of polished rod 2, thereby realize sealedly, simultaneously can also be through twisting adjusting bolt 9, further extrude cover 7 to pressing, thereby make gland packing 5 can receive pressure and expand, through twisting handle 112, make threaded rod 111 at fixed cover 10 internal rotation, thereby make four group's balls 12 can contact with the outer wall of polished rod 2, it is spacing to polished rod 2, prevent polished rod 2 skew, the wearing and tearing that long-time skew is rotatory to gland packing 5 causes are inhomogeneous, the life of gland packing 5 has been reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a polished rod sealing ware, includes packing box (1), its characterized in that: be equipped with polished rod (2) in packing box (1), and form between packing box (1) and polished rod (2) and hold chamber (3), from the top down sets gradually backing ring (4), sealing filler (5) and lower backing ring (6) in holding chamber (3), the top installation of going up backing ring (4) is pressed and is overlapped (7), cap (8) are pressed in the top installation of packing box (1), and press cap (8) to be located the top of pressing cover (7), the equal installation adjusting bolt (9) of the top left and right sides of pressing cap (8), the fixed cover (10) of bottom installation of packing box (1), evenly peg graft four group adjusting screw (11) that the structure is the same on fixed cover (10), four groups adjusting screw (11) are close to one side of polished rod (2) and all install ball (12).

2. The polish rod sealer of claim 1, wherein: the adjusting screw rod (11) is provided with a sliding clamping groove matched with the ball (12), and the opening diameter of the sliding clamping groove is smaller than the diameter of the ball (12).

3. The polish rod sealer of claim 1, wherein: the packing box (1) is in threaded connection with the pressing cap (8), the outer wall of the top of the packing box (1) is provided with external threads, and the inner wall of the pressing cap (8) is provided with internal threads.

4. The polish rod sealer of claim 1, wherein: the sealing packing (5) is a packing, and the section of the sealing packing (5) is rectangular.

5. The polish rod sealer of claim 1, wherein: adjusting screw (11) are including threaded rod (111) on fixed cover (10) of spiro union, threaded rod (111) keep away from one side installation handle (112) of ball (12), and install anti-skidding cover on handle (112).

6. The polish rod sealer of claim 1, wherein: the upper backing ring (4) and the lower backing ring (6) are both metal backing rings, and bosses are arranged at the bottom of the upper backing ring (4) and the top of the lower backing ring (6).