CN212330902U

CN212330902U - Valve seat drawing tool

Info

Publication number: CN212330902U
Application number: CN202020935416.3U
Authority: CN
Inventors: 姜琛; 李晓斌; 李明磊; 崔俊彦; 王继鑫; 李朋; 郭子蒙; 杨炳刚
Original assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Current assignee: Yantai Jereh Petroleum Equipment and Technologies Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-12
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a valve seat drawing tool, including split type jack catch, the stay cord, the clamp, the lead screw, the pneumatic cylinder and puller nut, split type jack catch includes first activity jack catch and second activity jack catch, first activity jack catch top is equipped with first pull ring, second activity jack catch top is equipped with the second pull ring, the clamp fastening is on the lead screw, the clamp both sides are equipped with the hole, the stay cord both ends clearing hole passes the clamp both sides respectively, and fix respectively on with first pull ring and second pull ring, the lead screw passes split type jack catch, the pneumatic cylinder is equipped with the intermediate hole, the lead screw upper end is equipped with the screw thread, pass the pneumatic cylinder through the intermediate hole, with puller nut threaded connection. Has the advantages that: the valve seat can be naturally separated by pulling the pull rope upwards, and the valve seat at the discharge end can be directly pulled without being disassembled in the valve box, so that the labor is saved; the drawing device does not need to be disassembled after each drawing is finished, so that the working efficiency is improved; the claw is not required to be internally provided with threads, so that the service life of the drawing tool is prolonged.

Description

Valve seat drawing tool

Technical Field

The utility model relates to an oil field equipment hand tool field, concretely relates to valve seat draws instrument.

Background

The valve seat is a key part of fixed equipment used for domestic oil exploitation, is an important component of a plunger pump, is used for controlling the opening and closing of a suction end and a discharge end of the plunger pump, and is increasingly severe along with the current oil field and shale gas operation, particularly the working conditions of well cementation, fracturing, acidification and other operations, the pressure is increasingly high, the pressure and impact load borne by the valve seat are continuously increased, and the valve seat is tightly pressed in a valve box and can be pulled out only by great force due to the interference fit between the valve seat and the valve box and large interference magnitude.

The dismantlement of present valve seat is through the cooperation use of jack catch and lead screw, when needs are dismantled, at first will put into the valve seat with the jack catch closure, be equipped with the screw in the middle of the jack catch, pass through the screw thread screw in jack catch with the lead screw again, pull the lead screw through external force at last, drive the valve seat and extract, and all need take out drawing tool from the valve box after extracting the valve seat at every turn, then dismantle the valve seat from drawing tool, just can carry out next drawing process afterwards, the step is loaded down with trivial details, waste time and energy, seriously influence work efficiency. In addition, if the valve seat at the suction end of the plunger pump is pulled out by the existing drawing tool, the suction end and the exhaust end are respectively provided with the valve seat, so that the drawing tool attached to the valve seat cannot be taken out, the valve seat and the drawing tool can only be disassembled in the valve box by workers, the operation is very troublesome, and meanwhile, the problems of jaw flanging breakage and thread deformation exist in the existing drawing tool after the existing drawing tool is used for a long time, so that the drawing tool cannot be used, and the service life of the drawing tool is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough that prior art is overcome to the purpose, provides a valve seat drawing tool, through stay cord alright make the valve seat of extracting break away from with drawing tool, need not additionally dismantle the process, improved work efficiency, the inside of split type jack catch need not set up the screw thread alright accomplish simultaneously and draw, the lead screw bottom is equipped with protruding and the laminating of split type jack catch bottom, increases the intensity of split type jack catch, has improved drawing tool's life.

The purpose of the utility model is achieved through the following technical measures: a valve seat drawing tool comprises a split type jack catch (1), a pull rope (2), a clamp (3), a lead screw (4), a hydraulic cylinder (5) and a drawing device nut (6), wherein the split type jack catch (1) comprises a first movable jack catch (7) and a second movable jack catch (8), a first pull ring (9) is arranged at the top end of the first movable jack catch (7), a second pull ring (10) is arranged at the top end of the second movable jack catch (8), the clamp (3) is fastened on the lead screw (4), holes are formed in two sides of the clamp (3), two ends of the pull rope (2) penetrate through two sides of the clamp (3) from top to bottom through the holes respectively and are fixed on the first pull ring (9) and the second pull ring (10) respectively, the distance between two holes of the clamp (3) is greater than the distance between the first pull ring (9) and the second pull ring (10), the lead screw (4) penetrates through the split type jack catch (1, and split type jack catch (1) is located clamp (3) lower extreme, hole in the middle of pneumatic cylinder (5) are equipped with, lead screw (4) upper end is equipped with the screw thread, and lead screw (4) upper end passes pneumatic cylinder (5) through hole in the middle of, with puller nut (6) threaded connection.

Further, first movable jaw (7) and second movable jaw (8) are the semicircle tube-shaped, and the two splices into cylindricly, first movable jaw (7) and second movable jaw (8) upper end circumference surface is equipped with the recess, the recess is equipped with the extension spring, the extension spring cover is on the recess, first movable jaw (7) and second movable jaw (8) lower extreme concatenation department is equipped with the space, the space is crescent from opening part to bottom, first movable jaw (7) and second movable jaw (8) bottom outside are equipped with the arch.

Furthermore, a lifting ring is arranged at the top of the screw rod (4).

Furthermore, the bottom of the screw rod (4) is provided with a bulge.

Further, the puller nut (6) comprises a nut and a handle, and the handle is arranged on the nut in the circumferential direction.

Further, clamp (3) are equipped with outer hex bolts, outer hex bolts is used for adjusting and fixed clamp (3).

Compared with the prior art, the beneficial effects of the utility model are that: by arranging the pull rope, the valve seat and the drawing tool do not need to be specifically disassembled after each drawing is finished, the valve seat can be separated from the drawing tool by pulling the pull rope upwards, and then the next drawing process can be directly carried out, so that a large amount of manpower is saved, and the working efficiency is improved; when the drawing tool firstly pulls out the valve seat at the suction end of the plunger pump, workers do not need to detach the valve seat in the valve box, so that the labor intensity is reduced; the inside of split type jack catch need not set up the screw thread alright accomplish and draw, and the lead screw bottom is equipped with protruding laminating bottom split type jack catch, increases split type jack catch's intensity, has improved the life of drawing the instrument.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of a valve seat pull tool.

Fig. 2 is a schematic view of a split jaw of the valve seat pulling tool.

Fig. 3 is a schematic sectional view of a valve seat drawing tool in a disassembling process.

The reference numbers in the drawings are as follows: 1. the novel hydraulic drawing device comprises a split type clamping jaw, 2 pull ropes, 3 hoops, 4 lead screws, 5 hydraulic cylinders, 6 puller nuts, 7 first movable clamping jaws, 8 second movable clamping jaws, 9 first pull rings, 10 second pull rings and 11 valve seats.

Detailed Description

As shown in fig. 1 to 3, a valve seat drawing tool comprises a split type jaw 1, a pull rope 2, a clamp 3, a screw rod 4, a hydraulic cylinder 5 and a puller nut 6, wherein the split type jaw 1 comprises a first movable jaw 7 and a second movable jaw 8, a first pull ring 9 is arranged at the top end of the first movable jaw 7, a second pull ring 10 is arranged at the top end of the second movable jaw 8, the clamp 3 is fastened on the screw rod 4, holes are arranged at two sides of the clamp 3, two ends of the pull rope 2 respectively pass through two sides of the clamp 3 from top to bottom through the holes and are respectively fixed on the first pull ring 9 and the second pull ring 10, the distance between the two holes of the clamp 3 is larger than the distance between the first pull ring 9 and the second pull ring 10, the screw rod 4 passes through the split type jaw 1, the split type jaw 1 is positioned at the lower end of the clamp 3, the hydraulic cylinder 5 is provided with a middle hole, the upper end of the screw rod 4 passes through the hydraulic cylinder 5 through a middle hole and is in threaded connection with the puller nut 6.

First movable jaw 7 and second movable jaw 8 are the semicircle tube-shape, and the two splices into cylindricly, and first

movable jaw

7 and 8 upper end circumference surfaces of second movable jaw are equipped with the recess, the recess is equipped with the extension spring, the extension spring cover is on the recess, first

movable jaw

7 and 8 lower extreme concatenation departments of second movable jaw are equipped with the space, the space is crescent from opening part to bottom, the bottom outside of first movable jaw 7 and second movable jaw 8 is equipped with the arch, realizes the laminating with terminal surface under 11 bottoms of valve seat, makes split type jack catch 1 block in 11 bottoms of valve seat.

Under the normal state, the tension spring naturally contracts, the upper end of the first movable clamping jaw 7 and the upper end of the second movable clamping jaw 8 are jointed together under the action of the tension spring, the lower ends are naturally separated, when the pull rope 2 is pulled upwards, since the distance between the two holes of the hoop 3 is larger than the distance between the first pull ring 9 and the second pull ring 10, the pull rope 2 respectively gives the first pull ring 9 and the second pull ring 10 an outward traction force, the upper ends of the first movable clamping jaw 7 and the second movable clamping jaw 8 move outwards, the tension spring is stretched, the lower ends are contracted and attached inwards, so that the split type clamping jaw 1 can enter the inner diameter of the valve seat 11, when the pull rope 2 is subjected to force unloading, the tension spring is recovered to be in a contraction state, the upper ends of the first movable clamping jaw 7 and the second movable clamping jaw 8 are attached together again, the lower ends of the first movable clamping jaw and the second movable clamping jaw are separated, and the bulge at the bottom of the first movable clamping jaw is attached to the lower end face of the bottom of the valve seat 11, so that the split type clamping jaw 1 is clamped at the bottom of the valve seat 11.

The top of the screw rod 4 is provided with a lifting ring, so that a worker can conveniently lift the whole drawing tool.

The bottom of the screw rod 4 is provided with a protrusion, when the screw rod 4 and the split type clamping jaw 1 enter the valve seat 11, the screw rod 4 is lifted upwards, the protrusion at the bottom of the screw rod 4 is attached to the bottom of the split type clamping jaw 1, and the screw rod 4 is clamped at the bottom of the split type clamping jaw 1.

Puller nut 6 includes nut and handle, the nut is equipped with the handle in week, makes things convenient for operating personnel to tighten and loosen.

The clamp 3 is provided with an outer hexagon screw for adjusting and fixing the clamp 3.

The hydraulic cylinder 5 comprises a base, a hydraulic interface and a hydraulic piston, hydraulic oil in the manual oil pump is pressed into the hydraulic interface through the manual oil pump by an operator, the hydraulic piston is pushed to move upwards by the hydraulic oil in the hydraulic interface, and the hydraulic piston is contacted with the puller nut 6 so as to push the puller nut 6 to move upwards.

The working principle is as follows: when the disassembly is needed, firstly, the pull rope 2 is lifted upwards to enable the split type clamping jaw 1 to contract inwards, the split type clamping jaw 1 and the lead screw 4 smoothly enter the inner diameter of the valve seat 11, then, the pull rope 2 is relieved, the split type clamping jaw 1 is clamped at the bottom of the valve seat 11, the lead screw 4 is lifted upwards through the lifting ring, the lead screw 4 is clamped at the bottom of the split type clamping jaw 1, the upper end of the lead screw 4 penetrates through the hydraulic cylinder 5 through the middle hole, then the puller nut 6 is screwed into the upper end of the hydraulic cylinder 5 from the upper end of the lead screw 4 through threads, an operator presses hydraulic oil into the hydraulic cylinder 5 through the hand oil pump, the hydraulic cylinder 5 pushes the puller nut 6 to move upwards, the puller nut 6 is in threaded connection with the lead screw 4 to drive the lead screw 4 to move, the lead screw 4 drives the split type clamping jaw 1, the split type clamping jaw 1 drives the valve seat 11, finally, the valve seat, the split type clamping jaw 1 is retracted inwards, and the valve seat 11 falls off naturally without being detached.

According to the technical scheme, the pull rope is arranged, the valve seat and the drawing tool do not need to be specifically disassembled after each drawing is finished, the pull rope is lifted upwards, so that the valve seat can be separated from the drawing tool, and then the next drawing process can be directly carried out, so that a large amount of manpower is saved, and the working efficiency is improved; when the drawing tool firstly pulls out the valve seat at the suction end of the plunger pump, workers do not need to detach the valve seat in the valve box, so that the labor intensity is reduced; the inside of split type jack catch need not set up the screw thread alright accomplish and draw, and the lead screw bottom is equipped with protruding laminating bottom split type jack catch, increases split type jack catch's intensity, has improved the life of drawing the instrument.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A valve seat drawing tool, its characterized in that: comprises a split type jack catch (1), a pull rope (2), a clamp (3), a lead screw (4), a hydraulic cylinder (5) and a puller nut (6), wherein the split type jack catch (1) comprises a first movable jack catch (7) and a second movable jack catch (8), a first pull ring (9) is arranged at the top end of the first movable jack catch (7), a second pull ring (10) is arranged at the top end of the second movable jack catch (8), the clamp (3) is fastened on the lead screw (4), holes are arranged at two sides of the clamp (3), two ends of the pull rope (2) respectively pass through two sides of the clamp (3) from top to bottom through holes and are respectively fixed on the first pull ring (9) and the second pull ring (10), the distance between two holes of the clamp (3) is greater than the distance between the first pull ring (9) and the second pull ring (10), the lead screw (4) passes through the split type jack catch (1), and the split type jack catch (1) is positioned at, the hydraulic cylinder (5) is provided with a middle hole, the upper end of the lead screw (4) is provided with threads, and the upper end of the lead screw (4) penetrates through the hydraulic cylinder (5) through the middle hole and is in threaded connection with the puller nut (6).

2. The valve seat pulling tool of claim 1, wherein: first activity jack catch (7) and second activity jack catch (8) are the semicircle tube-shape, and the two splices into cylindricly, first activity jack catch (7) and second activity jack catch (8) upper end circumference surface is equipped with the recess, be equipped with the extension spring in the recess, the extension spring cover is on the recess, first activity jack catch (7) and second activity jack catch (8) lower extreme concatenation department are equipped with the space, the space is crescent from opening part to bottom, first activity jack catch (7) and second activity jack catch (8) bottom outside are equipped with the arch.

3. The valve seat pulling tool of claim 1, wherein: the top of the screw rod (4) is provided with a lifting ring.

4. The valve seat pulling tool of claim 1, wherein: the bottom of the screw rod (4) is provided with a bulge.

5. The valve seat pulling tool of claim 1, wherein: the puller nut (6) comprises a nut and a handle, and the handle is arranged on the nut in the circumferential direction.

6. The valve seat pulling tool of claim 1, wherein: the clamp (3) is provided with an outer hexagon screw which is used for adjusting and fixing the clamp (3).