CN113510655A - Hydraulic end dismounting tool and method for plunger pump for oilfield water injection - Google Patents
Hydraulic end dismounting tool and method for plunger pump for oilfield water injection Download PDFInfo
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- CN113510655A CN113510655A CN202110703358.0A CN202110703358A CN113510655A CN 113510655 A CN113510655 A CN 113510655A CN 202110703358 A CN202110703358 A CN 202110703358A CN 113510655 A CN113510655 A CN 113510655A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
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Abstract
The invention relates to a hydraulic end dismounting tool and a hydraulic end dismounting method of a plunger pump for oilfield water injection, wherein a thread section of the right end of a drawing screw is screwed in a central screw hole of a seat plate, the right end of the drawing screw is provided with a square tenon, the left end of the drawing screw is connected with a tool body, the left end of the drawing screw is rotatably connected in a body counter bore of the right end surface of the tool body, a packing dismounting cylinder is screwed in the body central screw hole of the left end surface of the tool body, the left end of the packing dismounting cylinder is provided with an opening, the center of the right end surface is provided with a dismounting cylinder central screw, and the dismounting cylinder central screw extends rightwards and is screwed in the body central screw hole. The left part of the tool body is symmetrically provided with two cutting inclined planes, the right ends of the two cutting inclined planes are close to each other, the middle parts of the two cutting inclined planes are symmetrically provided with guide rails along the left and right directions, and the guide rails are respectively provided with tooth blocks capable of drawing small boxes. When the hydraulic end is detached, the hydraulic end is not required to be detached in a large range, and the hydraulic end can be operated by a single person, so that the maintenance time is greatly shortened, and the production efficiency is improved.
Description
Technical Field
The invention relates to a maintenance tool for an oil field pump room, in particular to a hydraulic end dismounting tool for a plunger pump for oil field water injection, and further relates to a hydraulic end dismounting method for the plunger pump for oil field water injection, belonging to the technical field of maintenance of the plunger pump for oil field water injection.
Background
The plunger pump is the main equipment of oil field water injection at present, mainly includes power end and fluid end. The power end mainly comprises a crankcase, a crankshaft, a bearing bush, a connecting rod, a crosshead, an intermediate rod, an oil seal and the like. In bent axle installation and the bent axle case, the one end of bent axle stretches out the crankcase and just installs the belt pulley outward, the connecting rod is installed respectively to the crank department of bent axle, the tip of each connecting rod articulates through the connecting rod round pin respectively has the cross head, the cross head is located the cylinder liner and makes horizontal reciprocating motion, it has the intermediate lever to have connect soon in the central screw thread seat of cross head right-hand member, the middle section of intermediate lever is worn out from the oil blanket box subassembly, oil blanket box subassembly is fixed on the right wall of crankcase, the right-hand member drive hydraulic end of intermediate lever.
The hydraulic end comprises a pump head, a plunger is arranged in a central pore passage of the pump head, the left end of the plunger extends out of the pump head, and a plunger convex ring is arranged at the left end head of the plunger; the right-hand member head of intermediate lever is equipped with the protruding circle of intermediate lever, and the protruding circle of intermediate lever passes through the square joint interconnect with the protruding circle of plunger, makes the intermediate lever can drive the plunger and do horizontal reciprocating motion, but does not transmit the moment of torsion.
The left end of pump head is fixed with the filler seat, the middle section of plunger passes from the centre bore of filler seat, it has multichannel carbon filler to fill in the packing box of filler seat, the left end of carbon filler is equipped with the packing clamping ring, the right-hand member of carbon filler has pressed the packing pressure spring seat, the right-hand member of packing pressure spring seat has pressed the packing pressure spring, the right-hand member of packing pressure spring supports in the left step of little letter body, little letter body inlays in the central hole of pump head, and it seals to realize through sealed the pad of little letter body between the left end port of little letter body and the right-hand member of filler seat. The left end of the carbon filler is provided with a gland nut, the gland nut is screwed on the left end external thread of the filler seat, the carbon filler is compressed from the left end through a filler compression ring, and the carbon filler is compressed from the right side by a filler compression spring seat under the tension action of a filler compression spring.
The feed liquor spring has been pressed on the right step of little letter body, and feed liquor spring's right-hand member is pressed at the left end of feed liquor valve block, and the right-hand member of feed liquor valve block supports and leans on the valve body assembly, and the right-hand member of valve body assembly supports and leans on the valve body end cap, and the right-hand member mouth outer wall of pump head centre bore is fixed with the end cap gland, and the inner wall of end cap gland pushes down the valve body end cap. The small box body provides a drawing and inserting space for the plunger and provides a supporting space for the packing pressure spring and the liquid inlet spring, when the plunger moves leftwards, the inner cavity of the small box body generates negative pressure, the liquid inlet valve plate is opened, and the valve body assembly finishes water absorption; when the plunger moves towards the driven part, the liquid inlet valve plate is closed, and the valve body assembly completes water injection.
After the operation for a period of time, the carbon filler is abraded, the abrasion reaches a certain degree and leakage occurs, and at the moment, the pump must be stopped for maintenance and the new filler is replaced. If the change of packing is untimely, can take place strong thorn when serious, lead to a large amount of water injection to gush into middle box, the seal receptacle between submergence intermediate lever and the crankcase, in the water injection infiltration crankcase, lead to lubricating oil emulsification inefficacy, the discovery can not cause the bigger loss of equipment in time.
The carbon filler is positioned in the deep cavity of the filler seat, so that the carbon filler is easy to press in but difficult to take out, only the upper part of the carbon filler can be operated by maintainers, and the two sides of the carbon filler are walls of the middle box body or adjacent plungers, so that the space is very limited. The middle rod is arranged in front of the axial direction, and no space exists, so that the work of taking the filler is time-consuming and labor-consuming. Often the parts in the peripheral space need be dismantled in a large number to the operative employee, just can operate, and the inner chamber of filler seat still can't be looked directly to eyes, can only rely on the sensation on the hand to get the filler with the long hook that has the arc of self-control unhook. Even so, the packing of packing seat box deepest still is difficult to take out, leads to easily that old packing to get unclean just begins to impress new packing, has influenced sealed effect, has also shortened the maintenance cycle. Every time, after the filler is replaced, peripheral parts are required to be restored and installed, the workload is high, the maintenance is frequent, and the production efficiency of the oil field is influenced. Under the smooth condition, the replacement and the disassembly of the filler each time can be completed by about half a day by three or four persons, the operation difficulty is high, and the workload is large. When the scale is seriously scaled or the bolt is rusted, the time is prolonged, the production can be recovered all day long, the yield is influenced, and the underground potential safety hazard is also brought.
Furthermore, the small letter needs to be replaced in two cases: 1. the sealing gasket of the small box body between the small box body and the filling seat is damaged; 2. because the liquid inlet valve plate is opened and closed in a reciprocating manner, certain abrasion and impact are generated on the inner diameter of the small box body, and the small box body needs to be replaced when the abrasion of the inner diameter is larger than the outer diameter of the liquid inlet valve plate by 0.5 mm. Because the little letter body is in the rear end of packing seat, according to traditional dismantlement method, change little letter body and must dismantle earlier just can take out behind the packing seat, be compelled to change the filler in advance like this, and work load is huge and cause spare part excessive consumption. The little box body inlays in the central pore of pump head, lacks the position that can draw, and the one end space that the filler seat is located is very little, and eyes can't be directly viewed, has further increased the degree of difficulty of maintaining.
Disclosure of Invention
The invention aims to overcome the defects of small operation space and difficult operation when the hydraulic end of the plunger pump is used for replacing the filler, and provides the hydraulic end disassembling tool of the plunger pump for oilfield water injection, which can be operated by one person without large-range disassembly, greatly shortens the maintenance time and improves the production efficiency.
In order to solve the technical problems, the hydraulic end dismounting tool of the plunger pump for oilfield water injection comprises a drawing screw rod, wherein the thread section of the right end of the drawing screw rod is screwed in the central screw hole of a seat plate, the right end of the drawing screw rod is provided with a square tenon, and two ends of the seat plate are provided with seat plate fixing holes; the left end of the drawing screw is connected with a tool body coaxial with the drawing screw, the tool body is a cylinder, a body counter bore is formed in the center of the right end face of the tool body, and the left end of the drawing screw is rotatably connected in the body counter bore; the left end face center of instrument body is equipped with body central screw, it dismantles a section of thick bamboo to connect the packing in the body central screw soon, the left end opening and the right-hand member face center of a section of thick bamboo are dismantled to the packing are equipped with even as an organic whole dismantlement section of thick bamboo central screw rod with it, it extends right and connects soon to dismantle a section of thick bamboo central screw rod in the body central screw.
As an improvement of the invention, the inner diameter of the packing disassembling cylinder is larger than the outer diameter of a plunger of the plunger pump, and the outer diameter of the packing disassembling cylinder is smaller than the inner diameter of a packing pressure spring of the plunger pump.
As a further improvement of the invention, the left part of the tool body is symmetrically provided with two cutting inclined planes, the right ends of the two cutting inclined planes are close to each other, the middle parts of the two cutting inclined planes are symmetrically provided with guide rails along the left and right directions, and the guide rails are respectively provided with tooth blocks capable of drawing small boxes.
As a further improvement of the invention, the guide rail is a dovetail tenon with a wide outer part and a narrow inner part, the cross section of the tooth block is crescent, the middle part of the bottom surface of the tooth block is provided with a dovetail groove, and the dovetail groove is inserted on the dovetail tenon.
As a further improvement of the invention, the guide rails are fixed on the corresponding cutting inclined planes by countersunk screws; the tool comprises a drawing screw, a body counter bore, a drawing screw, a screw gland, a driving lever and a driving lever, wherein the drawing screw is arranged in the body counter bore, the tool body is fixedly provided with the screw gland through a screw, the screw gland is provided with two symmetrical halves, the inner edge of the screw gland is clamped in the ring groove after the screw gland is surrounded, and the screw gland is provided with a gland groove for the driving lever to pass through.
As a further improvement of the invention, the periphery of the tooth block is arc-shaped, a plurality of inverted tooth rows are arranged along the length direction of the tooth block, and the radius of the right end of each inverted tooth row is larger than that of the left end of each inverted tooth row.
As a further improvement of the invention, a tooth block screw hole is arranged in the middle of the right end face of the tooth block, body grooves penetrating along the left and right directions are respectively arranged on the two sides of the right part of the tool body, the axis of the body groove and the axis of the guide rail are positioned in the same plane, deflector rod through holes are symmetrically arranged on the two sides of the central screw hole of the seat plate, deflector rods are respectively inserted into the deflector rod through holes, the left end screw heads of the deflector rods penetrate through the body grooves and are screwed into the tooth block screw holes, and pull rings are respectively arranged at the right ends of the two deflector rods.
As a further improvement of the invention, the axis of the tooth block screw hole and the axis of the dovetail groove form an included angle, and the distance between the right end ports of the tooth block screw holes at two sides is larger than the distance between the root parts at the left end.
As a further improvement of the invention, the depth of the inner cavity of the packing disassembling cylinder is greater than the distance between the outer port of the packing seat of the plunger pump and the left end of the small box body, and the outer diameter of the packing disassembling cylinder is not greater than the outer diameter of the tool body.
Compared with the prior art, the invention has the following beneficial effects: this dismantlement frock can significantly reduce dismantlement scope, only needs to dismantle the readily removable part on pump head centre bore right side, will need three or four people half a day in the past just work of accomplishing, shortens to only alone, can accomplish half an hour, greatly reduced work load, the work that makes the change filler becomes simple swift and controllable.
Another purpose of the invention is to overcome the defects of small operation space, force application point lack and difficult operation when the hydraulic end of the plunger pump is used for replacing the filler and the small box body, and provide a hydraulic end dismounting method of the plunger pump for oilfield water injection, which can be operated by one person without large-range dismounting, greatly shortens the maintenance time and improves the production efficiency.
In order to solve the technical problems, the method for disassembling the hydraulic end of the plunger pump for oilfield water injection sequentially comprises the following steps of: s1, disassembling a right part of a small letter body in a central hole of a pump head of the plunger pump; s2, screwing off a gland nut on the packing seat at the left end of the central duct of the pump head, and then detaching the packing press ring at the left end of the carbon packing; s3, assembling a hydraulic end disassembling tool; s4, inserting the packing disassembling barrel and the tool body of the disassembling tool into a central hole of the pump head from right to left; s5, the seat plate is abutted against the outer wall of the right port of the central duct of the pump head, the seat plate fixing holes at the two ends of the seat plate are sleeved on the plug gland stud on the wall of the pump head, and the seat plate is fixed by screwing a nut; s6, pulling the two shift levers rightwards to enable the two tooth blocks on the disassembling tool to respectively slide to the rightmost ends of the cutting inclined planes on the two sides of the tool body along the dovetail; s7, rotating the square tenon at the right end of the drawing screw rod in the forward direction to enable the drawing screw rod to extend leftwards, inserting the packing disassembling barrel into the inner cavity of the small box body, sleeving the left end opening of the packing disassembling barrel on the periphery of the right end head of the plunger, and then pushing the packing disassembling barrel leftwards along an annular channel between the periphery of the plunger and a packing compression spring until the left end opening of the packing disassembling barrel abuts against the inner edge of the right end of the packing compression spring seat; and S8, continuing to rotate the drawing screw rod in the forward direction, and pushing the packing pressure spring seat and the packing on the left side of the packing pressure spring seat out of the left port of the packing seat by the packing disassembling barrel.
As an improvement of the invention, the method also comprises the following steps: s9, pushing the two shift levers leftwards to enable the two tooth blocks on the disassembling tool to slide leftwards along the dovetail joint respectively, and enabling the inverted tooth on the periphery of the two tooth blocks to eat the inner wall of the small box body; s10, the drawing screw rod is rotated reversely, so that the tool body moves rightwards, the small box body is clamped by the two tooth blocks to drive the small box body to move rightwards until the small box body is taken out from the right port of the central hole of the pump head.
As a further improvement of the present invention, step S1 includes the following sub-steps: s1.1, removing a plug gland on the outer wall of the right end of a central duct of a pump head; s1.2, taking out a valve body plug at the right end of a central pore passage of the pump head; s1.3, taking out the valve body assembly and the liquid inlet valve plate in a central pore passage of the pump head; and S1.4, taking out the liquid inlet spring.
As a further improvement of the present invention, step S3 includes the following sub-steps: s3.1, respectively installing tooth blocks with crescent cross sections on cutting inclined planes on two sides of a tool body, wherein the tool body is a cylinder, the right ends of the two cutting inclined planes are close to each other, dovetails with wide outer parts and narrow inner parts are symmetrically arranged in the middle of the two cutting inclined planes in the left-right direction, and a dovetail groove is arranged in the middle of the bottom surface of each tooth block and is inserted into the dovetail groove; s3.2, inserting the left end of the drawing screw rod into a body counter bore in the center of the right end face of the tool body, arranging an annular groove on the circumference of the outer side of the inserting end, surrounding and clamping the screw rod gland which is divided into two halves at the annular groove, and fixing the screw rod gland on the right end face of the tool body through a screw; s3.3, mounting a seat plate at the right end of the drawing screw, wherein the right end thread head of the drawing screw is screwed in a central hole of the seat plate, and a square tenon is arranged at the right end of the drawing screw; s3.4, deflector rod through holes are symmetrically formed in two sides of a central screw hole of the seat plate, body grooves penetrating in the left-right direction are formed in two sides of the right part of the tool body respectively, and the axis of each body groove and the axis of each dovetail joint are located in the same plane; the two deflector rods respectively penetrate through the deflector rod through holes from right to left and then respectively penetrate through the grooves of the body, and then the left end screw heads of the two deflector rods are respectively screwed into the screw holes of the tooth blocks on the right end surface of the corresponding tooth blocks; s3.5, connect the packing to dismantle a section of thick bamboo soon at the left end of instrument body, the left end opening and the right-hand member face center that a section of thick bamboo was dismantled to the packing are equipped with even as an organic whole dismantlement section of thick bamboo central screw rod with it, dismantle a section of thick bamboo central screw rod and extend right and connect soon in the body center screw at instrument body left end face center.
Compared with the prior art, the invention has the following beneficial effects: 1. the right side space of the pump head is more abundant, and the plug gland, the valve body plug, the valve body assembly, the liquid inlet valve plate and the liquid inlet spring can be conveniently and sequentially detached. The space on the left side of the pump head is narrow, but the gland nut is screwed off, and the packing press ring at the left end of the carbon packing is also convenient to disassemble. After the disassembling tool is assembled and the seat plate is fixed at the right end of the pump head, the filler is pushed out to the left end by forward rotating drawing screw rods, and then the small box body can be pulled out to the right by reversely rotating drawing screw rods. 2. The square tenon is rotated through the wrench to realize the rotation of the drawing screw rod, and the drawing screw rod cannot be disengaged from the tool body in forward rotation or reverse rotation. 3. The invention can greatly reduce the disassembly range, only needs to disassemble the easily disassembled part at the right side of the center hole of the pump head, shortens the work which can be completed by three or four persons in half a day to the work which can be completed by only one person in half an hour, greatly reduces the labor workload, and ensures that the work of replacing the filler becomes simple, rapid and controllable.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
Fig. 1 is a front view of a hydraulic end dismounting tool of a plunger pump for oilfield water injection.
Fig. 2 is a first perspective view of the first hydraulic end dismounting tool of the plunger pump for oilfield flooding according to the present invention.
Fig. 3 is a second perspective view of the hydraulic end dismounting tool of the plunger pump for oilfield flooding according to the present invention.
Fig. 4 is an exploded view of the hydraulic end dismounting tool of the plunger pump for oilfield flooding according to the present invention.
Fig. 5 is a perspective view of the tool body of the present invention.
Fig. 6 is a state diagram of the hydraulic end of the plunger pump before disassembly.
Fig. 7 is a state diagram of the hydraulic end of the plunger pump when detached.
In the figure: 1. drawing the screw; 1a, an annular groove; 1b, square tenon; 2. a seat plate; 2a, a central screw hole of the seat plate; 2b, a seat plate fixing hole; 2c, a deflector rod through hole; 3. a tool body; 3a, cutting a bevel; 3b, dovetail joint; 3c, countersunk head screws; 3d, forming a counter bore of the body; 3e, a groove of the body; 4. a dental block; 4a, a dovetail groove; 4b, reversely pulling teeth; 5. a screw rod gland bush; 5a, pressing a cover groove; 6. a packing removal barrel; 6a, disassembling a central screw rod of the cylinder; 7. a deflector rod; 7a, a pull ring; 8. a plunger; 9. a gland nut; 10. a filler seat; 11. packing and pressing a ring; 12. carbon filler; 13. a packing pressure spring seat; 14. a packing compression spring; 15. a small letter body; 16. a liquid inlet spring; 17. a liquid inlet valve plate; 18. a valve body assembly; 19. a valve body plug; 20. and (6) pressing the plug.
Detailed Description
As shown in fig. 1 to 5, the hydraulic end dismounting tool of the plunger pump for oilfield water injection comprises a drawing screw rod 1, wherein a thread section of the right end of the drawing screw rod 1 is screwed in a central screw hole 2a of a seat plate 2, a square tenon 1b is arranged at the right end of the drawing screw rod 1, and seat plate fixing holes 2b are arranged at two ends of the seat plate 2; the left end of the drawing screw rod 1 is connected with a tool body 3 coaxial with the drawing screw rod, the tool body 3 is a cylinder, a body counter bore 3d is formed in the center of the right end face of the tool body 3, and the left end of the drawing screw rod 1 is rotatably connected into the body counter bore 3 d; the left end face center of the tool body 3 is provided with a body center screw hole, a packing disassembling barrel 6 is screwed in the body center screw hole, a disassembling barrel center screw 6a which is connected with the packing disassembling barrel 6 and is integrated with the packing disassembling barrel is arranged at the left end opening and the right end face center of the packing disassembling barrel 6, and the disassembling barrel center screw 6a extends rightwards and is screwed in the body center screw hole.
The hydraulic end comprises a pump head, a plunger is arranged in a central pore passage of the pump head, the left end of the plunger extends out of the pump head, and a plunger convex ring is arranged at the left end head of the plunger; the right-hand member head of intermediate lever is equipped with the protruding circle of intermediate lever, and the protruding circle of intermediate lever passes through the square joint interconnect with the protruding circle of plunger, makes the intermediate lever can drive the plunger and do horizontal reciprocating motion, but does not transmit the moment of torsion.
As shown in fig. 6, a packing seat is fixed at the left end of the pump head, the middle section of the plunger 8 passes through a central hole of the packing seat 10, a plurality of carbon packings 12 are filled in a packing box of the packing seat 10, a packing compression ring 11 is arranged at the left end of each carbon packing 12, a packing compression spring seat 13 is pressed at the right end of each carbon packing 12, a packing compression spring 14 is pressed at the right end of each packing compression spring seat 13, the right end of each packing compression spring 14 is supported in a left step of a small box body 15, the small box body 15 is embedded in a central hole of the pump head, and sealing is realized between the left end port of the small box body 15 and the right end of the packing seat 10 through a small box body sealing gasket. The left end of the carbon filler 12 is provided with a gland nut 9, the gland nut 9 is screwed on the left end external thread of the filler seat 10, the carbon filler 12 is compressed from the left end through a filler compression ring 11, and the carbon filler 12 is compressed from the right side by a filler compression spring seat 13 under the tension action of a filler compression spring 14.
The liquid inlet spring 16 is pressed on the right step of the small box body 15, the right end of the liquid inlet spring 16 is pressed at the left end of the liquid inlet valve plate 17, the right end of the liquid inlet valve plate 17 abuts against the valve body assembly 18, the right end of the valve body assembly 18 abuts against the valve body plug 19, the outer wall of the right end opening of the center hole of the pump head is fixed with the plug gland 20, and the inner wall of the plug gland 20 presses the valve body plug 19.
The right side of the pump head has more abundant space, the plug gland 20 on the right side of the central hole of the pump head can be conveniently detached, and the valve body plug 19, the valve body assembly 18, the liquid inlet valve plate 17 and the liquid inlet spring 16 are sequentially taken out; the left space parts of the pump head are more, but the gland nut 9 is screwed off, and the packing press ring 11 at the left end of the carbon packing 12 is still more convenient to detach.
As shown in fig. 7, the seat plate 2 is abutted against the wall outside the right port of the central duct of the pump head, the seat plate fixing holes 2b at the two ends of the seat plate 2 are sleeved on the plug gland studs on the wall of the pump head, and the nut is screwed to fix the seat plate 2; at the moment, the packing dismounting cylinder 6 is positioned in the inner cavity of the small box body 15, and the left port of the packing dismounting cylinder is sleeved on the periphery of the right end head of the plunger 8. The square tenon 1b at the right end of the drawing screw rod 1 is positively rotated to enable the drawing screw rod 1 to extend leftwards, and the packing disassembling cylinder 6 is pushed leftwards along an annular channel between the periphery of the plunger 8 and the packing pressure spring 14 until the left port of the packing disassembling cylinder 6 abuts against the inner edge of the right end of the packing pressure spring seat 13; and the pulling screw rod 1 is rotated forwards continuously, and the packing disassembling barrel 6 pushes the packing pressure spring seat 13 and the packing on the left side out of the left port of the packing seat 10.
The inner diameter of the packing disassembling cylinder 6 is larger than the outer diameter of a plunger 8 of the plunger pump, and the outer diameter of the packing disassembling cylinder 6 is smaller than the inner diameter of a packing pressure spring 14 of the plunger pump. The packing dismounting cylinder 6 can be pushed leftwards along an annular channel between the periphery of the plunger 8 and the packing compression spring 14, and when the left port of the packing dismounting cylinder 6 abuts against the right end of the packing compression spring seat 13, the carbon packing 12 can be pushed out by continuing to push.
The left part of the tool body 3 is symmetrically provided with two cutting inclined planes 3a, the right ends of the two cutting inclined planes 3a are close to each other, the middle parts of the two cutting inclined planes 3a are symmetrically provided with guide rails along the left and right direction, and the guide rails are respectively provided with tooth blocks 4 for disassembling the small box body 15. When the tooth block 4 slides to the right end of the cutting inclined plane 3a along the guide rail, the distance between the two tooth blocks 4 is reduced, the outermost edges of the two tooth blocks 4 cannot contact the inner wall of the small box body 15, and when the packing disassembling barrel 6 pushes the carbon filler 12 leftwards, the interference between the two tooth blocks 4 and the small box body 15 can be avoided. Tooth piece 4 slides to when cutting inclined plane 3 a's left end along the guide rail, the distance increase between two tooth pieces 4, make the outermost edge of two tooth pieces 4 block the inner wall of little letter body 15, when drawing screw rod 1 and driving tool body 3 and move right, two tooth pieces 4 increase and slide to cutting inclined plane 3 a's main aspects, make two tooth pieces 4 chucking more at the inner wall of little letter body 15 and can not loosen and take off, so move along with the right-hand movement of tool body 3, two tooth pieces 4 block little letter body 15 and make it move right, finally take out from the right-hand member mouth of pump head centre bore.
The guide rail is a dovetail 3b with a wide outer part and a narrow inner part, the cross section of the tooth block 4 is crescent, a dovetail groove 4a is arranged in the middle of the bottom surface of the tooth block 4, and the dovetail groove 4a is inserted into the dovetail 3b. The dovetail 3b is matched with the dovetail groove 4a, so that the tooth block 4 can only slide along the dovetail 3b and can not fall off.
The guide rail is fixed on the corresponding cutting inclined plane 3a through a countersunk head screw 3 c; the guide rail can be processed alone, then fixed through countersunk screw 3c, can reduce the processing degree of difficulty and processing cost.
The drawing tool comprises a drawing screw 1, and is characterized in that an annular groove 1a is formed in the circumference of the left end of the drawing screw 1, the annular groove 1a is inserted into a body counter bore 3d through a left end head, a screw gland 5 is fixed to the right end face of the tool body 3 through screws, the screw gland 5 is provided with two symmetrical halves, the inner edge of the screw gland 5 is clamped in the annular groove 1a after the screw gland 5 surrounds the inner edge, and a gland groove 5a for a deflector rod 7 to pass through is formed in the screw gland 5. The screw rod gland 5 is made into a half shape, so that the screw rod gland is convenient to surround from two sides in opposite directions, and is embedded into the annular groove 1a of the drawing screw rod 1, the axial fixing of the inserting end of the drawing screw rod 1 and the tool body 3 is realized, and when the drawing screw rod 1 rotates forwards or reversely, the tool body 3 cannot rotate along with the screw rod, so that the forward rotation and the reverse rotation of the drawing screw rod 1 are prevented from causing tripping with the tool body 3.
The periphery of tooth piece 4 is arc, and is equipped with multichannel back-off teeth 4b along the length direction of tooth piece 4, and the right-hand member radius of every way back-off teeth 4b is greater than the left end radius, is convenient for bite down the inner wall of little letter body 15.
The right end face middle part of tooth piece 4 is equipped with the tooth piece screw, and the right part both sides of instrument body 3 are equipped with respectively along controlling the body recess 3e that the direction link up, and the axis of body recess 3e is located same plane with the axis of guide rail, and bedplate center screw 2a bilateral symmetry is equipped with driving lever through-hole 2c, has pegged graft respectively in the driving lever through-hole 2c and has the driving lever 7, and the left end thread head of driving lever 7 passes body recess 3e and connects the tooth piece screw soon, and the right-hand member of two driving levers 7 is equipped with pull ring 7a respectively. The body groove 3e provides an avoiding space for the deflector rod 7, and the left end of the deflector rod 7 is connected with the tooth block 4; the two deflector rods 7 are pulled rightwards, so that the two tooth blocks 4 slide to the rightmost end of the cutting inclined plane 3a along the dovetail 3b respectively, and the two tooth blocks 4 can pass through the small box body 15 smoothly. Two driving levers 7 are pushed leftwards, so that the two tooth blocks 4 on the disassembling tool respectively slide leftwards along the dovetail joints 3b, the outer edges of the two tooth blocks 4 are made to eat the inner wall of the small letter body 15, and then the tooth blocks 4 move rightwards along with the tool body 3 so as to pull out the small letter body 15.
The axis of the tooth block screw hole and the axis of the dovetail groove 4a form an included angle, and the distance between the right end openings of the tooth block screw holes on the two sides is larger than the distance between the root parts of the left ends. The right end of the thread hole axis of the tooth block is outwards opened to compensate the inclination of the cutting inclined plane 3a, so that the deflector rod 7 can be conveniently screwed into the thread hole of the tooth block.
The inner cavity depth of the packing dismounting cylinder 6 is greater than the distance between the outer end of the packing seat 10 of the plunger pump and the left end of the small box body 15, and the outer diameter of the packing dismounting cylinder 6 is not greater than that of the tool body 3. Before the bottom wall of the packing disassembling barrel 6 contacts the right end head of the plunger 8, all the carbon packing 12 can be pushed out of the packing seat 10.
The invention discloses a method for disassembling a hydraulic end of a plunger pump for oilfield water injection, which sequentially comprises the following steps:
s1, disassembling the right part of the small letter body 15 in the central hole of the pump head of the plunger pump;
s2, screwing off a gland nut 9 on a packing seat 10 at the left end of a central duct of the pump head, and then detaching a packing press ring 11 at the left end of carbon packing 12;
s3, assembling a hydraulic end disassembling tool;
s4, inserting the packing disassembling barrel 6 and the tool body 3 of the disassembling tool into a central hole of the pump head from right to left;
s5, the seat plate is abutted against the outer wall of the right port of the central duct of the pump head, the seat plate fixing holes 2b at the two ends of the seat plate are sleeved on the plug gland stud on the wall of the pump head, and the seat plate is fixed by screwing a nut;
s6, pulling the two shift levers 7 rightwards to enable the two tooth blocks 4 on the disassembling tool to slide to the rightmost ends of the cutting inclined planes 3a on the two sides of the tool body 3 respectively along the dovetail 3 b;
s7, rotating the square tenon 1b at the right end of the drawing screw rod 1 in the forward direction to enable the drawing screw rod 1 to extend leftwards, inserting the packing disassembling barrel 6 into the inner cavity of the small box body 15, sleeving the left end opening of the packing disassembling barrel on the periphery of the right end head of the plunger 8, and then pushing the packing disassembling barrel 6 leftwards along an annular channel between the periphery of the plunger 8 and the packing pressure spring 14 until the left end opening of the packing disassembling barrel 6 abuts against the inner edge of the right end of the packing pressure spring seat 13;
s8, the pulling screw rod 1 continues to rotate in the positive direction, and the packing dismounting cylinder 6 pushes the packing pressure spring seat 13 and the packing on the left side out of the left port of the packing seat 10.
The small letter 15 is then drawn, comprising the following steps: s9, pushing the two shift levers 7 leftwards to enable the two tooth blocks 4 on the disassembling tool to slide leftwards along the dovetail 3b respectively, and enabling the inverted tooth 4b on the periphery of the two tooth blocks 4 to eat the inner wall of the small box body 15;
s10, the drawing screw rod 1 is rotated reversely, so that the tool body 3 moves rightwards, the small box body 15 is clamped by the two tooth blocks 4 to drive the small box body to move rightwards until the small box body is taken out from the right end opening of the central hole of the pump head.
Step S1 includes the following sub-steps: s1.1, removing a plug gland 20 on the outer wall of the right end of a central duct of the pump head;
s1.2, taking out a valve body plug 19 at the right end of a central pore passage of the pump head;
s1.3, taking out a valve body assembly 18 and a liquid inlet valve plate 17 in a central pore passage of a pump head;
s1.4, taking out the liquid inlet spring 16.
Step S3 includes the following sub-steps: s3.1, respectively installing tooth blocks 4 with crescent cross sections on cutting inclined planes 3a on two sides of a tool body 3, wherein the tool body 3 is a cylinder, the right ends of the two cutting inclined planes 3a are close to each other, dovetails 3b with wide outer parts and narrow inner parts are symmetrically arranged in the middle of the two cutting inclined planes 3a along the left-right direction, a dovetail groove 4a is arranged in the middle of the bottom surface of each tooth block 4, and the dovetail groove 4a is inserted into the dovetail groove 3 b;
s3.2, inserting the left end of the drawing screw 1 into a body counter bore 3d in the center of the right end face of the tool body 3, arranging an annular groove 1a on the circumference of the outer side of the inserting end, surrounding and clamping the screw gland 5 divided into two halves at the annular groove 1a, and fixing the screw gland 5 on the right end face of the tool body 3 through a screw;
s3.3, mounting a seat plate at the right end of the drawing screw 1, screwing a right-end thread head of the drawing screw 1 into a central hole of the seat plate, and arranging a square tenon 1b at the right-end head of the drawing screw 1;
s3.4, deflector rod through holes 2c are symmetrically formed in two sides of a central screw hole 2a of the seat plate, body grooves 3e which penetrate through the right side and the left side are formed in two sides of the right part of the tool body 3 respectively, and the axis of each body groove 3e and the axis of each dovetail 3b are located in the same plane; the two deflector rods 7 respectively penetrate through the deflector rod through holes 2c from right to left and then respectively penetrate through the body grooves 3e, and then the left end thread heads of the two deflector rods 7 are respectively screwed into the tooth block screw holes on the right end surface of the corresponding tooth blocks 4;
s3.5, the packing disassembling barrel 6 is connected to the left end of the tool body 3 in a screwing mode, a disassembling barrel central screw rod 6a which is connected with the packing disassembling barrel 6 into a whole is arranged at the center of the left end opening and the right end face of the packing disassembling barrel 6, and the disassembling barrel central screw rod 6a extends rightwards and is connected to the center of the left end face of the tool body 3 in a screwing mode.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (13)
1. The utility model provides an oil field is hydraulic end of plunger pump for water injection dismantles frock, includes draws the screw rod, its characterized in that: the thread section of the right end of the drawing screw is screwed in the central screw hole of the seat plate, the right end of the drawing screw is provided with a square tenon, and two ends of the seat plate are provided with seat plate fixing holes; the left end of the drawing screw is connected with a tool body coaxial with the drawing screw, the tool body is a cylinder, a body counter bore is formed in the center of the right end face of the tool body, and the left end of the drawing screw is rotatably connected in the body counter bore; the left end face center of instrument body is equipped with body central screw, it dismantles a section of thick bamboo to connect the packing in the body central screw soon, the left end opening and the right-hand member face center of a section of thick bamboo are dismantled to the packing are equipped with even as an organic whole dismantlement section of thick bamboo central screw rod with it, it extends right and connects soon to dismantle a section of thick bamboo central screw rod in the body central screw.
2. The oil field is hydraulic end of plunger pump dismantles frock of claim 1 for water injection, its characterized in that: the inner diameter of the packing disassembling barrel is larger than the outer diameter of a plunger of the plunger pump, and the outer diameter of the packing disassembling barrel is smaller than the inner diameter of a packing pressure spring of the plunger pump.
3. The oil field is hydraulic end of plunger pump dismantles frock of claim 1 for water injection, its characterized in that: the left part symmetry of tool body is equipped with two cutting inclined planes, and the right-hand member on two cutting inclined planes draws close each other, and the middle part on two cutting inclined planes is equipped with the guide rail along left and right direction symmetry, be equipped with the tooth piece that can draw the little box on the guide rail respectively.
4. The oil field is hydraulic end of plunger pump dismantles frock of claim 3 for water injection, its characterized in that: the guide rail is a dovetail tenon with a wide outer part and a narrow inner part, the cross section of the tooth block is crescent, a dovetail groove is arranged in the middle of the bottom surface of the tooth block, and the dovetail groove is inserted into the dovetail tenon.
5. The oil field is hydraulic end of plunger pump dismantles frock of claim 3 for water injection, its characterized in that: the guide rail is fixed on the corresponding cutting inclined plane through a countersunk head screw; the tool comprises a drawing screw, a body counter bore, a drawing screw, a screw gland, a driving lever and a driving lever, wherein the drawing screw is arranged in the body counter bore, the tool body is fixedly provided with the screw gland through a screw, the screw gland is provided with two symmetrical halves, the inner edge of the screw gland is clamped in the ring groove after the screw gland is surrounded, and the screw gland is provided with a gland groove for the driving lever to pass through.
6. The oil field is hydraulic end of plunger pump dismantles frock of claim 3 for water injection, its characterized in that: the periphery of tooth piece is arc, and is equipped with the multichannel tooth of pulling upside down along the length direction of tooth piece, and the right-hand member radius of every way tooth of pulling upside down is greater than the left end radius.
7. The oil field is hydraulic end of plunger pump dismantles frock of water injection according to claim 6, characterized in that: the tool comprises a tool body, a guide rail, a seat plate, a driving lever and a driving lever, wherein a tooth block screw hole is formed in the middle of the right end face of the tooth block, body grooves which are communicated along the left-right direction are formed in the two sides of the right portion of the tool body respectively, the axis of each body groove and the axis of the guide rail are located in the same plane, driving lever through holes are symmetrically formed in the two sides of the center screw hole of the seat plate, the driving lever is inserted into the driving lever through holes respectively, a threaded head at the left end of the driving lever penetrates through the body groove and is connected into the tooth block screw hole in a screwing mode, and pull rings are arranged at the right ends of the two driving levers respectively.
8. The oil field is hydraulic end of plunger pump dismantles frock of claim 7 for water injection, its characterized in that: the axis of the tooth block screw hole and the axis of the dovetail groove form an included angle, and the distance between the right end openings of the tooth block screw holes on the two sides is larger than the distance between the roots of the left ends.
9. The oil field is hydraulic end of plunger pump dismantles frock of claim 3 for water injection, its characterized in that: the inner cavity depth of the packing disassembly barrel is greater than the distance between the outer port of the packing seat of the plunger pump and the left end of the small box body, and the outer diameter of the packing disassembly barrel is not greater than the outer diameter of the tool body.
10. A method for disassembling a hydraulic end of a plunger pump for oilfield water injection is characterized by sequentially comprising the following steps: s1, disassembling a right part of a small letter body in a central hole of a pump head of the plunger pump;
s2, screwing off a gland nut on the packing seat at the left end of the central duct of the pump head, and then detaching the packing press ring at the left end of the carbon packing;
s3, assembling a hydraulic end disassembling tool;
s4, inserting the packing disassembling barrel and the tool body of the disassembling tool into a central hole of the pump head from right to left;
s5, the seat plate is abutted against the outer wall of the right port of the central duct of the pump head, the seat plate fixing holes at the two ends of the seat plate are sleeved on the plug gland stud on the wall of the pump head, and the seat plate is fixed by screwing a nut;
s6, pulling the two shift levers rightwards to enable the two tooth blocks on the disassembling tool to respectively slide to the rightmost ends of the cutting inclined planes on the two sides of the tool body along the dovetail;
s7, rotating the square tenon at the right end of the drawing screw rod in the forward direction to enable the drawing screw rod to extend leftwards, inserting the packing disassembling barrel into the inner cavity of the small box body, sleeving the left end opening of the packing disassembling barrel on the periphery of the right end head of the plunger, and then pushing the packing disassembling barrel leftwards along an annular channel between the periphery of the plunger and a packing compression spring until the left end opening of the packing disassembling barrel abuts against the inner edge of the right end of the packing compression spring seat;
and S8, continuing to rotate the drawing screw rod in the forward direction, and pushing the packing pressure spring seat and the packing on the left side of the packing pressure spring seat out of the left port of the packing seat by the packing disassembling barrel.
11. The method for disassembling the hydraulic end of the plunger pump for oilfield flooding according to claim 10, further comprising the steps of:
s9, pushing the two shift levers leftwards to enable the two tooth blocks on the disassembling tool to slide leftwards along the dovetail joint respectively, and enabling the inverted tooth on the periphery of the two tooth blocks to eat the inner wall of the small box body;
s10, the drawing screw rod is rotated reversely, so that the tool body moves rightwards, the small box body is clamped by the two tooth blocks to drive the small box body to move rightwards until the small box body is taken out from the right port of the central hole of the pump head.
12. The method for disassembling the hydraulic end of the plunger pump for oilfield water injection according to claim 10, wherein the step S1 comprises the following sub-steps:
s1.1, removing a plug gland on the outer wall of the right end of a central duct of a pump head;
s1.2, taking out a valve body plug at the right end of a central pore passage of the pump head;
s1.3, taking out the valve body assembly and the liquid inlet valve plate in a central pore passage of the pump head;
and S1.4, taking out the liquid inlet spring.
13. The method for disassembling the hydraulic end of the plunger pump for oilfield water injection according to claim 10, wherein the step S3 comprises the following sub-steps:
s3.1, respectively installing tooth blocks with crescent cross sections on cutting inclined planes on two sides of a tool body, wherein the tool body is a cylinder, the right ends of the two cutting inclined planes are close to each other, dovetails with wide outer parts and narrow inner parts are symmetrically arranged in the middle of the two cutting inclined planes in the left-right direction, and a dovetail groove is arranged in the middle of the bottom surface of each tooth block and is inserted into the dovetail groove;
s3.2, inserting the left end of the drawing screw rod into a body counter bore in the center of the right end face of the tool body, arranging an annular groove on the circumference of the outer side of the inserting end, surrounding and clamping the screw rod gland which is divided into two halves at the annular groove, and fixing the screw rod gland on the right end face of the tool body through a screw;
s3.3, mounting a seat plate at the right end of the drawing screw, wherein the right end thread head of the drawing screw is screwed in a central hole of the seat plate, and a square tenon is arranged at the right end of the drawing screw;
s3.4, deflector rod through holes are symmetrically formed in two sides of a central screw hole of the seat plate, body grooves penetrating in the left-right direction are formed in two sides of the right part of the tool body respectively, and the axis of each body groove and the axis of each dovetail joint are located in the same plane; the two deflector rods respectively penetrate through the deflector rod through holes from right to left and then respectively penetrate through the grooves of the body, and then the left end screw heads of the two deflector rods are respectively screwed into the screw holes of the tooth blocks on the right end surface of the corresponding tooth blocks;
s3.5, connect the packing to dismantle a section of thick bamboo soon at the left end of instrument body, the left end opening and the right-hand member face center that a section of thick bamboo was dismantled to the packing are equipped with even as an organic whole dismantlement section of thick bamboo central screw rod with it, dismantle a section of thick bamboo central screw rod and extend right and connect soon in the body center screw at instrument body left end face center.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110703358.0A CN113510655B (en) | 2021-06-24 | 2021-06-24 | Hydraulic end dismounting tool and method for plunger pump for oilfield water injection |
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| CN202110703358.0A CN113510655B (en) | 2021-06-24 | 2021-06-24 | Hydraulic end dismounting tool and method for plunger pump for oilfield water injection |
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| CN113510655B CN113510655B (en) | 2022-09-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110162187A1 (en) * | 2009-07-13 | 2011-07-07 | Weir Spm, Inc. | Threaded rod plunger installation tool |
| CN207033447U (en) * | 2017-07-24 | 2018-02-23 | 实用动力(中国)工业有限公司 | A kind of portable cutter pick set hydraulic drawing tool |
| CN207465128U (en) * | 2018-02-06 | 2018-06-08 | 中国南方电网有限责任公司调峰调频发电公司天生桥水力发电总厂 | A kind of shaft sleeve withdrawal tool |
| CN208977697U (en) * | 2018-09-12 | 2019-06-14 | 合肥美桥汽车传动及底盘系统有限公司 | A kind of provision for disengagement of axle housing inner oil seal |
-
2021
- 2021-06-24 CN CN202110703358.0A patent/CN113510655B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110162187A1 (en) * | 2009-07-13 | 2011-07-07 | Weir Spm, Inc. | Threaded rod plunger installation tool |
| CN207033447U (en) * | 2017-07-24 | 2018-02-23 | 实用动力(中国)工业有限公司 | A kind of portable cutter pick set hydraulic drawing tool |
| CN207465128U (en) * | 2018-02-06 | 2018-06-08 | 中国南方电网有限责任公司调峰调频发电公司天生桥水力发电总厂 | A kind of shaft sleeve withdrawal tool |
| CN208977697U (en) * | 2018-09-12 | 2019-06-14 | 合肥美桥汽车传动及底盘系统有限公司 | A kind of provision for disengagement of axle housing inner oil seal |
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| CN113510655B (en) | 2022-09-06 |
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