CN211648444U

CN211648444U - Combined plunger for pump

Info

Publication number: CN211648444U
Application number: CN201922375188.9U
Authority: CN
Inventors: 秦松; 杨佳霖; 王振新; 张倩倩; 李志民; 周建桥; 严淑群; 夏光明
Original assignee: Hunan Metallurgy Material Institute Co ltd
Current assignee: Hunan Metallurgy Material Institute Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-10-09
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a combined plunger for a pump, which comprises a cylindrical plunger body, a connecting block plug, an adjusting rod and a ball head; one end of the cylindrical plunger body is provided with a connecting convex ring which extends outwards in the radial direction, the center of the other end of the cylindrical plunger body extends inwards in the axial direction to form a first threaded hole, and the connecting convex ring extends outwards and coaxially to form a first positioning shaft; the end face of the connecting block plug, which faces the cylindrical plunger body, is attached to and connected with the connecting convex ring; one end of the adjusting rod is matched with the first threaded hole and is inserted into the first threaded hole in a threaded connection mode, a circle of flange is arranged in the middle of the adjusting rod, and a pre-tightening bolt penetrates through the flange threads; the bulb can be dismantled and connect and keep away from the one end of cylindrical plunger body at the regulation pole. The plug and the ball head of the utility model are detachably connected, and can be replaced independently when being worn and damaged, thereby reducing the maintenance cost; can cooperate different pumps to use through the bulb of adjusting length and changing different specifications and connecting block end cap, reduce design cost and manufacturing cost.

Description

Combined plunger for pump

Technical Field

The utility model relates to a spare part field for the pump especially relates to a combination plunger for pump.

Background

In recent years, with the progress of oil and gas drilling technology, deep wells and ultra-deep wells are continuously explored and found, which undoubtedly puts higher requirements on the long-life operation of drilling equipment. The plunger is a key part in the plunger pump, when an oil field user uses the plunger pump to perform well cementation and fracturing operation, the excircle of the plunger is tightly matched with the packing seal ring, the axial stroke of the plunger is about 350 times per minute, the stroke is about 0.2m, and the plunger simultaneously bears the sealing pressure of 70-105 MPa. Taking a slurry pump as an example, the working medium may contain 80-200 meshes of high-hardness quartz sand, the HRC is about 70 (about HV1100), the content is 0.2% -0.5%, and the working medium can be abraded by abrasive grains with the plunger; and in some areas with the chloride ion content as high as 10000mg/L, serious water body corrosion exists. Under the operating condition, the two ends of the plunger piston are easily abraded and corroded, so that the whole plunger piston is scrapped, and the operation and maintenance cost of equipment is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving above-mentioned technical problem to a certain extent at least. Therefore, the utility model provides a fortune dimension is combination plunger for with low costs.

The utility model provides a technical scheme that its technical problem adopted is: a combined plunger for a pump comprises a cylindrical plunger body, a connecting block plug, an adjusting rod and a ball head; one end of the cylindrical plunger body is provided with a connecting convex ring which extends outwards in the radial direction, the center of the other end of the cylindrical plunger body extends inwards in the axial direction to form a first threaded hole, and the connecting convex ring extends outwards and coaxially to form a first positioning shaft; the end face, facing the cylindrical plunger body, of the connecting block plug is attached to and connected with the connecting convex ring, the connecting block plug is detachably connected with the connecting convex ring, and a first positioning hole for enabling the connecting convex ring to be embedded, matched and positioned is formed in the end face of the connecting block plug; one end of the adjusting rod is matched with the first threaded hole and is inserted into the first threaded hole in a threaded connection mode, a circle of flange is arranged in the middle of the adjusting rod, a pre-tightening bolt penetrates through the flange thread, and the end portion of the pre-tightening bolt abuts against the end portion of the cylindrical plunger body; the bulb can be dismantled and connect and keep away from the one end of cylindrical plunger body at the regulation pole.

According to the utility model discloses combination plunger for pump has following technological effect at least: the positioning of the connecting block plug and the cylindrical plunger body is realized through the matching of the first positioning shaft and the first positioning hole, the connecting block plug and the cylindrical plunger body are detachably connected, and when the plug is damaged, the plug can be replaced only, so that the cost is saved; the adjusting rod is connected with the cylindrical plunger body through threads and provides an axial pretightening force through a pretightening bolt, so that the adjusting rod cannot easily rotate to cause position deviation; the ball head is detachably connected to the adjusting rod, and can be independently replaced when worn and damaged, so that the maintenance cost is reduced; additionally, the utility model discloses an adjust pole and cylindrical plunger body can be through the screw thread length of adjusting, in addition connecting block end cap and the connection dismantled of bulb, can cooperate different pumps to use through the bulb and the connecting block end cap of adjusting length and changing different specifications, reduce design cost and manufacturing cost.

According to the utility model discloses a some embodiments, connect the bulge loop and be equipped with a plurality of first mounting holes that encircle the range around the center, the connecting block end cap is equipped with the second screw hole that corresponds first mounting hole, first mounting hole aligns and has packed into first bolt with the second screw hole.

According to some embodiments of the present invention, the ball head is provided with a connecting post extending outward, the outer end of the connecting post extends outward in a radial direction to form a connecting plate, and the connecting plate is attached to and connected with the end surface of the adjusting rod; the connecting disc is detachably connected with the adjusting rod.

According to the utility model discloses a some embodiments, the connection pad is equipped with a plurality of second mounting holes that encircle the range around the center, it is equipped with the third screw hole that corresponds with the second mounting hole to adjust the pole rather than the terminal surface that pastes mutually, the second mounting hole aligns and packs into with the third screw hole has the second bolt.

According to the utility model discloses a some embodiments, the terminal surface that the regulation pole pasted with the connection pad mutually is equipped with the second locating hole, the outer terminal surface of connection pad is equipped with the second location axle that matches and imbed the second locating hole with the second locating hole.

According to some embodiments of the utility model, connecting block end cap surface is provided with the cladding.

According to some embodiments of the invention, the coating is an iron-based alloy, cobalt-based alloy or nickel-based alloy coating.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is an exploded view of the installation state of the embodiment of the present invention

Fig. 2 is a schematic view of an installation structure of an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the invention.

Detailed Description

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

Referring to fig. 1 to 3, the present invention provides a combined plunger for pump, including a cylindrical plunger body 100, a connecting block plug 200, an adjusting rod 300 and a ball head 400.

One end of the cylindrical plunger body 100 is provided with a connecting convex ring 110 which is formed by extending outwards in the radial direction, the center of the other end of the cylindrical plunger body extends inwards in the axial direction to form a first threaded hole 130, and the connecting convex ring 110 is provided with a first positioning shaft 120 which extends outwards coaxially; the end face of the connecting block plug 200 facing the cylindrical plunger body 100 is attached to and connected with the connecting convex ring 110, the connecting block plug 200 is detachably connected with the connecting convex ring 110, and when the connecting block plug 200 is damaged, only the connecting block plug 200 can be replaced, so that the cost is saved. The end face of the connecting block plug 200 is provided with a first positioning hole 210 for the connecting convex ring 110 to be embedded, matched and positioned, the first positioning hole 210 is coaxial with the connecting block plug 200, and the diameter of the connecting block plug 200 is larger than or equal to that of the connecting convex ring 110 so that the connecting convex ring 110 does not protrude out of the peripheral wall of the connecting block plug 200. The first positioning shaft 120 is matched with the first positioning hole 210 to realize the positioning connection between the connecting block plug 200 and the cylindrical plunger body 100. One end of the adjusting rod 300 is adapted to the first threaded hole 130 and is inserted into the first threaded hole 130 in a threaded connection manner, a circle of flange 310 is arranged in the middle of the adjusting rod, a pre-tightening bolt 312 penetrates through the flange 310 in a threaded manner, the flange 310 is provided with a fourth threaded hole 311 adapted to the pre-tightening bolt 312, as shown in fig. 2 and 3, the number of the fourth threaded holes 311 and the number of the pre-tightening bolts 312 are symmetrically two, the end portion of the pre-tightening bolt 312 abuts against the end portion of the cylindrical plunger body 100, and the pre-tightening bolt 312 applies an axial pre-tightening thrust to the cylindrical plunger body 100, so that the cylindrical plunger body 100 and the connecting block. The bulb 400 is detachably connected at one end of the adjusting rod 300 far away from the cylindrical plunger body 100, and the bulb 400 is detachably connected on the adjusting rod and can be independently replaced when being worn and damaged, so that the maintenance cost is reduced. The utility model discloses an adjust pole 300 and cylindrical plunger body 100 can be through the screw thread length of adjusting, in addition connecting block end cap 200 and bulb 400 can dismantle and be connected, can cooperate different pumps to use through bulb 400 and the connecting block end cap 200 of adjusting length and changing different specifications, improve its application scope, reduce design cost and manufacturing cost.

In some embodiments of the present invention, the connection convex ring 110 is provided with a plurality of first mounting holes 111 arranged around the center, the connection block plug 200 is provided with a second threaded hole 220 corresponding to the first mounting hole 111, the first mounting hole 111 aligns with the second threaded hole 220 and is filled with the first bolt 112, as shown in fig. 1, four uniform holes are formed in the first mounting hole 111, the second threaded hole 220 and the first bolt 112, the connection is detachable through the bolt connection, and the connection block plug 200 is convenient to detach and replace.

In some embodiments of the present invention, the ball head 400 is provided with a connecting post 410 extending outward, and the axis of the connecting post 410 passes through the center of the ball head 400 to ensure the coaxiality of the subsequent installation. Spliced pole 410 outer end is radially outwards extended and is formed with a connection pad 420, connection pad 420 profile is not more than adjusts pole 300 diameter, connection pad 420 pastes with the pole 300 terminal surface of adjusting and connects, connection pad 420 and pole 300 are for dismantling to be connected, provide installation space through connection pad 420 to convenient the connection. In the embodiment of the present invention, the connection pad 420 is provided with a plurality of second mounting holes 421 arranged around the center, the end surface of the adjusting rod 300 attached to the second mounting hole 421 is provided with a third threaded hole 321 corresponding to the second mounting hole 421, the second mounting hole 421 is aligned with the third threaded hole 321 and is filled with a second bolt 422, and the second bolt 422 and the corresponding hole are arranged to be detachable, so that the installation is convenient. In the utility model discloses a further embodiment, the terminal surface that the regulation pole 300 and connection pad 420 pasted is equipped with second locating hole 320, and second locating hole 320 is coaxial with regulation pole 300 in order to guarantee that bulb 400 is coaxial with regulation pole 300, the outer terminal surface of connection pad 420 is equipped with the second location axle 430 that matches with second locating hole 320 and imbed second locating hole 320, realizes its coaxial positioning through second locating hole 320 and second location axle 430, after the location, makes things convenient for follow-up construction bolt.

In some embodiments of the present invention, the outer surface of the connecting block plug 200 is provided with a coating layer, which improves the wear resistance and corrosion resistance of the connecting block plug 200. Specifically, the coating is made of iron-based alloy, cobalt-based alloy, nickel-based alloy coating, amorphous/nanocrystalline, high-entropy alloy or metal ceramic and the like, and the metal coating is sprayed or welded on the surface of the connecting block plug 200. In order to ensure the performance of the connecting block plug 200, the thickness of the coating layer on the surface of the connecting block plug 200 is 0.2-5mm, and the surface roughness is 0.5-0.8.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A combined plunger for a pump, comprising:

the plunger piston comprises a cylindrical plunger piston body (100), wherein one end of the cylindrical plunger piston body is provided with a connecting convex ring (110) which extends outwards in the radial direction, the center of the other end of the cylindrical plunger piston body extends inwards in the axial direction to form a first threaded hole (130), and the connecting convex ring (110) extends outwards coaxially to form a first positioning shaft (120);

the end face of the connecting block plug (200) facing the cylindrical plunger body (100) is attached to and connected with the connecting convex ring (110), the connecting block plug (200) is detachably connected with the connecting convex ring (110), and the end face of the connecting block plug (200) is provided with a first positioning hole (210) for the connecting convex ring (110) to be embedded, matched and positioned;

one end of the adjusting rod (300) is matched with the first threaded hole (130) and is inserted into the first threaded hole (130) in a threaded connection mode, a circle of flange (310) is arranged in the middle of the adjusting rod, a pre-tightening bolt (312) penetrates through the flange (310) in a threaded mode, and the end portion of the pre-tightening bolt (312) abuts against the end portion of the cylindrical plunger body (100);

the ball head (400) is detachably connected to one end, far away from the cylindrical plunger body (100), of the adjusting rod (300).

2. The combination plunger for a pump of claim 1, wherein: the connecting convex ring (110) is provided with a plurality of first mounting holes (111) arranged around the center in a surrounding mode, the connecting block plug (200) is provided with second threaded holes (220) corresponding to the first mounting holes (111), and the first mounting holes (111) are aligned to the second threaded holes (220) and are filled with first bolts (112).

3. The combination plunger for a pump of claim 1, wherein: bulb (400) outwards extend and are equipped with a spliced pole (410), spliced pole (410) outer end radially outwards extends and is formed with a connection pad (420), connection pad (420) and regulation pole (300) terminal surface paste and connect, connection pad (420) are connected for dismantling with regulation pole (300).

4. The combination plunger for a pump of claim 3, wherein: the connecting disc (420) is provided with a plurality of second mounting holes (421) which are arranged around the center in a surrounding mode, the end face, attached to the adjusting rod (300), of the adjusting rod is provided with third threaded holes (321) corresponding to the second mounting holes (421), and the second mounting holes (421) are aligned to the third threaded holes (321) and are filled with second bolts (422).

5. The combination plunger for a pump of claim 4, wherein: the end face of the adjusting rod (300) attached to the connecting disc (420) is provided with a second positioning hole (320), and the outer end face of the connecting disc (420) is provided with a second positioning shaft (430) which is matched with the second positioning hole (320) and is embedded into the second positioning hole (320).

6. The combination plunger for a pump of claim 1, wherein: and a coating layer is arranged on the outer surface of the connecting block plug (200).

7. The combination plunger for a pump of claim 6, wherein: the coating is an iron-based alloy, cobalt-based alloy or nickel-based alloy coating.