CN217123037U

CN217123037U - Tool for pulling small box body of plunger pump

Info

Publication number: CN217123037U
Application number: CN202121412157.7U
Authority: CN
Inventors: 肖学培; 厉昌峰; 张峰; 顾建国
Original assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-08-05
Anticipated expiration: 2031-06-24

Abstract

The utility model relates to a tool for pulling small letter bodies of plunger pumps, which comprises a pulling screw rod, wherein the thread section of the right end of the pulling screw rod is screwed in the central screw hole of a seat plate, the right end of the pulling screw rod is provided with a square tenon, and both ends of the seat plate are provided with seat plate fixing holes; the left end of the drawing screw rod is connected with a tool body coaxial with the drawing screw rod, 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 rod is rotatably connected in the body counter bore; 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. 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. When the small letter body is disassembled, the small letter body does not need to be disassembled on a large scale, and can be operated by a single person, so that the maintenance time is greatly shortened, and the production efficiency is improved.

Description

Tool for pulling small box body of plunger pump

Technical Field

The utility model relates to an oil field pump house maintains frock especially relates to a little letter body pulling tool of plunger pump, belongs to the technical field of plunger pump maintenance for the 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 hole channel 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.

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. The disassembly and assembly can be completed by about half a day by three or four persons each time, and the operation difficulty and the workload are high. 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.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that when the small box body of the plunger pump hydraulic end needs to be disassembled, peripheral parts such as the filler seat need to be disassembled first, the operation space is small, and the operation is difficult, and the small box body extracting tool of the plunger pump is provided, which is not required to be disassembled on a large scale, can be operated by a single person, greatly shortens the maintenance time, and improves the production efficiency.

In order to solve the technical problem, the utility model discloses a tool for pulling out a small box body of a plunger pump, which comprises a pulling screw rod, wherein the thread section of the right end of the pulling screw rod is screwed in the central screw hole of a seat plate, the right end of the pulling 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 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.

As a further improvement, the guide rail is a dovetail with an outer width and an inner width, 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.

As a further improvement of the present invention, the dovetail is fixed to the corresponding cutting inclined plane by a countersunk head screw.

As a further improvement, be equipped with the annular groove on drawing the left end circumference of screw rod, the annular groove is pegged graft with the end on a left side in the body counter bore, the right-hand member face of instrument body has the screw rod gland through the fix with screw, the screw rod gland is equipped with the two halves of symmetry, and surrounds the inner edge joint of back screw rod gland and be in the annular groove, be equipped with the gland recess that supplies the driving lever to pass through on the screw rod gland.

As a further improvement, the periphery of the tooth block is arc-shaped, and is equipped with a plurality of undercut teeth along the length direction of the tooth block, and the right-hand member radius of each undercut tooth is greater than the left end radius.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 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.

Drawings

The invention will be described in further detail with reference to the drawings and the 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 the small box extracting tool of the plunger pump of the present invention.

Fig. 2 is a first perspective view of the extracting tool for the small box body of the plunger pump.

Fig. 3 is a second perspective view of the small box extracting tool of the plunger pump of the present invention.

Fig. 4 is an exploded view of the small box extracting tool of the plunger pump of 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 small box of the plunger pump when it is 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, countersinking the body; 3c, 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. dovetail joints; 6a, countersunk head screws; 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 tool for pulling out the small box body of the plunger pump of the present invention comprises a pulling screw 1, wherein a thread section of a right end of the pulling screw 1 is screwed in a central screw hole of a seat plate 2, a square tenon 1b is arranged at a right end of the pulling screw 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 3b 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 in the body counter bore 3 b; 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 capable of drawing the small box body 15.

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.

As shown in fig. 7, the right side of the pump head has a relatively large space, so that the plug gland 20 on the right side of the center hole of the pump head can be conveniently removed, and the valve plug 19, the valve assembly 18, the liquid inlet valve sheet 17 and the liquid inlet spring 16 can be sequentially taken out. The seat plate 2 is abutted against the outer wall of the right port of the central duct of the pump head, seat plate fixing holes 2b at two ends of the seat plate 2 are sleeved on a plug gland stud on the wall of the pump head, and a nut is screwed to fix the seat plate 2; when the tool body 3 is inserted into the inner cavity of the small letter body 15, the tooth blocks 4 slide 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 letter body 15, and the interference between the two tooth blocks 4 and the small letter body 15 is avoided.

Prepare to draw little letter body 15, make tooth piece 4 slide to the left end of cutting inclined plane 3a 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, draw screw 1 and drive tool body 3 and move when moving right, two tooth pieces 4 increase and slide to the main aspects of cutting inclined plane 3a, 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 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 6 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 6. The dovetail 6 is matched with the dovetail groove 4a, so that the tooth block 4 can only slide along the dovetail 6 and can not fall off.

The dovetail 6 can be processed separately and then fixed on the corresponding cutting inclined plane 3a through a countersunk head screw 6a, so that the processing difficulty and the processing cost can be reduced.

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 3b 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 the tooth block 4 is arc-shaped, a plurality of inverted tooth 4b are arranged along the length direction of the tooth block 4, and the radius of the right end of each inverted tooth 4b is larger than that of the left end. The reverse-pulling teeth 4b are convenient for gripping the inner wall of the small box body 15.

The middle of the right end face of the tooth block 4 is provided with a tooth block screw hole, two sides of the right part of the tool body 3 are respectively provided with a body groove 3c which is communicated along the left-right direction, the axis of the body groove 3c and the axis of the guide rail are positioned in the same plane, two sides of the central screw hole 2a of the seat plate are symmetrically provided with a deflector rod through hole 2c, a deflector rod 7 is respectively inserted into the deflector rod through hole 2c, and a left end screw head of the deflector rod 7 penetrates through the body groove 3c to be screwed into the tooth block screw hole. The body groove 3c 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 respectively slide to the rightmost end of the cutting inclined plane 3a along the dovetail 6, and the two tooth blocks 4 can smoothly pass through the small box body 15. 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 6, 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 right ends of the two shift levers 7 are respectively provided with a pull ring 7a. Facilitating the movement of the tooth block 4 to the left or right by means of the shift lever 7.

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 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 the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a little letter of plunger pump instrument of pulling out, includes draws the screw rod, its characterized in that: the right end thread section 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 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.

2. The tool for extracting a small box of a plunger pump according to claim 1, wherein: 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.

3. The tool for extracting a small box of a plunger pump according to claim 2, wherein: the dovetail is fixed on the corresponding cutting inclined plane through a countersunk head screw.

4. The tool for extracting a small box of a plunger pump according to claim 1, wherein: 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.

5. The tool for extracting a small box of a plunger pump according to claim 1, wherein: 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.