CN212130692U - Piston mud pump adopting split type piston assembly - Google Patents
Piston mud pump adopting split type piston assembly Download PDFInfo
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- CN212130692U CN212130692U CN201922314720.6U CN201922314720U CN212130692U CN 212130692 U CN212130692 U CN 212130692U CN 201922314720 U CN201922314720 U CN 201922314720U CN 212130692 U CN212130692 U CN 212130692U
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Abstract
The utility model discloses a piston mud pump adopting a split type piston assembly, which comprises a hydraulic end and a power end; a plurality of liquid pumping systems are arranged between the hydraulic end and the power end; each liquid pumping system comprises a valve box component, a pull rod mounting sleeve and a transmission component; each valve box component is arranged on the hydraulic end, and each pull rod mounting sleeve is arranged on the power end; the transmission assembly comprises a pull rod, a pull rod sealing assembly, a piston rod and a piston; a corrugated pipe coaxial with the pull rod is movably connected between the end of the pull rod close to the valve box body and the power end; the adjusting and connecting assembly is positioned outside the corrugated pipe; the liquid inlet of each valve box component is respectively connected with a liquid inlet pipe; the liquid outlet of each valve box component is connected with the liquid outlet pipe. The utility model discloses the mud pump can realize the interchange of single liquid, biliquid, many liquid, can realize that the different ratios of liquid mix, and the liquid pump pressure is stable, the liquid misce bene.
Description
Technical Field
The utility model relates to a pump technical field especially relates to a piston mud pump.
Background
The slurry pump is an important production device in the oil field industry, is an important component of drilling equipment, is mainly used for deep well and shallow well operation of the oil field, can complete water plugging and oil displacement operation to an oil well, can also be used for cementing plug, channeling sealing, well washing, sand washing and well cementation operation during oil field well repair, near and remote conveying pressure test of crude oil and the like.
The main cause of piston failure in mud pumps is wear of the piston. The abrasion of the piston causes the sealing performance of the piston to be reduced, so that high-pressure mud can enter the piston mounting sleeve more easily, and the abrasion failure of the piston is accelerated. The abrasion of the piston is usually caused by that the frictional lubrication performance is reduced due to poor sealing performance of the piston and a wear-resistant layer in a piston mounting sleeve, so that the piston works under the condition of high friction and becomes the most easily damaged part of the slurry pump. The piston, the sealing device, the liquid inlet valve, the liquid outlet valve and the like work under the working conditions of high temperature, high pressure and high speed, the service life of the devices is very short due to uneven pressure in a pump, most of the parts are made of metal materials, the surfaces of the parts are easy to corrode and abrade, the parts must be replaced periodically, and otherwise, the parts are easy to leak and partially easy to lose efficacy, so that potential safety hazards are caused. In addition, the wear-resistant layer in the piston mounting sleeve is replaced by a new piston, so that the piston mounting sleeve is usually required to be detached, and the time for stopping the pump is long. Pumps of the above type are therefore expensive to operate and maintain, and despite many solutions they have not been able to solve the problem at all times.
In addition, in the prior art, during the well repair of the slurry pump oil field, the operations of cement plug injection, channeling sealing, well washing, sand washing and well cementation are carried out, mixed slurry solutions with different proportion requirements are often required to be injected in the process of crude oil near and remote conveying and pressure testing, and the stroke of the conventional multi-cylinder slurry pump is fixed, so that the conventional multi-cylinder slurry pump is not suitable for the actual conditions with different requirements on the slurry solutions and the mixing requirements under different use environments.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piston mud pump of stroke can be finely tuned to prior art not enough.
The utility model adopts the technical proposal as follows.
A piston mud pump adopting a split type piston assembly comprises a hydraulic end and a power end;
a plurality of liquid pumping systems are arranged between the hydraulic end and the power end;
each liquid pumping system comprises a valve box component, a pull rod mounting sleeve and a transmission component; each valve box component is arranged on the hydraulic end, and each pull rod mounting sleeve is arranged on the power end; the transmission assembly comprises a pull rod, a pull rod sealing assembly, a piston rod and a piston.
The valve box assembly comprises a valve box body, a liquid inlet and a liquid outlet which are arranged on the side wall of the valve box body, and a valve box body inner cavity arranged in the valve box body; the piston mounting sleeve is arranged on the side wall of the valve box body close to the pull rod mounting sleeve side and communicated with the inner cavity of the valve box body; the central axis of the piston mounting sleeve is transversely arranged.
The end of each piston rod, which is far away from the pull rod mounting sleeve, is positioned in the piston mounting sleeve, and the piston is mounted at the end of the piston rod, which is far away from the pull rod mounting sleeve; be equipped with feed liquor valve, play liquid valve in the valve box, the feed liquor valve links to each other with the inlet, goes out the liquid valve and links to each other its characterized in that with the liquid outlet:
the pull rod is arranged on the pull rod mounting sleeve through a pull rod sealing device; the pull rod is connected with the piston rod through the adjusting and connecting assembly.
The adjusting and connecting assembly comprises two connecting half sleeves, a hemispherical first connecting head is arranged at the end, close to the piston rod, of the pull rod, and a hemispherical second connecting head is arranged at the end, close to the pull rod, of the piston rod; the central point connecting line of the first connector and the second connector and the central axis of the piston rod are on the same straight line; two ends of the two connecting half sleeves are respectively provided with a first clamping groove which is adaptive to the half part of the pull rod close to the piston rod end and the first connecting head on the piston rod end and a second clamping groove which is adaptive to the half part of the piston rod close to the pull rod end and the second connecting head on the piston rod end; the two connecting half sleeves are butted together through the connecting piece to form a butting structure, the inner part of the butting structure clamps the first connector and the second connector, and the outer part of the butting structure is cylindrical.
A piston mounting sleeve end cover is arranged on the piston mounting sleeve close to the pull rod mounting sleeve end in a threaded manner; a piston rod through hole is formed in the end cover of the piston mounting sleeve, and a butt joint structure formed by the two connecting half sleeves penetrates through the piston rod through hole; the central axes of the pull rod, the piston rod and the piston rod through hole are on the same straight line.
The piston mounting sleeve is internally sleeved with a steel sleeve; the end of the steel sleeve, which is far away from the pull rod mounting sleeve, is contacted with the valve box body; a boss is arranged on the radial peripheral surface of the steel sleeve close to the end of the pull rod mounting sleeve; the end of the boss close to the valve box body is not contacted with the end of the piston mounting sleeve far away from the valve box body; the radial inner peripheral surface of the steel sleeve is provided with a wear-resistant layer; the end of the steel sleeve, which is close to the pull rod mounting sleeve, extends out of the piston mounting sleeve and is contacted with the end cover of the piston mounting sleeve; the steel sleeve is fixed in the piston mounting sleeve by rotating the end cover of the piston mounting sleeve.
The piston comprises a piston end cover, a sealing body and a piston main body, wherein the piston end cover is arranged at the end, far away from the pull rod mounting sleeve, of the piston rod; the piston end cover is in threaded connection with the end, far away from the pull rod, of the piston main body, the sealing body is extruded by rotating the piston end cover, and the sealing body is tightly attached to the radial inner peripheral surface of the steel sleeve.
A corrugated pipe coaxial with the pull rod is movably connected between the end of the pull rod close to the valve box body and the power end; the adjusting and connecting assembly is positioned outside the corrugated pipe.
The liquid inlet of each valve box component is connected with the main liquid inlet pipe through a liquid inlet pipe, and the liquid outlet of each valve box component is connected with the liquid outlet pipe; two ends of the main liquid inlet pipe are provided with one side liquid inlet valve; flow control valves are respectively arranged between the liquid inlet pipe positioned in the middle of the three liquid inlet pipes on the main liquid inlet pipe and the liquid inlet pipes on the two sides of the liquid inlet pipe; the middle liquid inlet valve is connected between the two flow control valves on the main liquid inlet pipe through the middle liquid inlet pipe.
The liquid inlet valve comprises a liquid inlet valve annular valve seat, a liquid inlet valve compression spring and a liquid inlet valve body, wherein the liquid inlet valve body can seal the liquid inlet, and the liquid inlet valve annular valve seat is connected with the liquid inlet valve annular valve seat through the liquid inlet valve compression spring.
The liquid outlet valve comprises a liquid outlet valve pressing spring, a liquid outlet valve annular valve seat, a liquid outlet valve body capable of sealing an inner hole of the liquid outlet valve annular valve seat and a pressing spring, the liquid outlet valve annular valve seat is connected with the valve box body through the liquid outlet valve pressing spring, and the liquid outlet is formed at the connecting position of the liquid outlet valve pressing spring and the valve box body; the annular valve seat of the liquid outlet valve is connected with the annular valve seat of the liquid inlet valve through a compression spring.
The cross section of the inner cavity of the valve box body is circular; the central axes of the inner cavity of the valve box body, the annular valve seat of the liquid inlet valve, the pressure spring of the liquid inlet valve, the valve body of the liquid inlet valve, the pressure spring, the annular valve seat of the liquid outlet valve, the pressure spring of the liquid outlet valve, the valve body of the liquid outlet valve, the liquid inlet and the liquid outlet are on the same straight line; the rigidity of the pressing spring is greater than that of the liquid outlet valve pressing spring and greater than that of the liquid inlet valve pressing spring.
The liquid inlet of each valve box component is respectively connected with a liquid inlet pipe; the liquid outlet of each valve box component is connected with the liquid outlet pipe.
As the preferred technical scheme, the outer diameter of the piston end cover is smaller than that of the convex ring; the end of the convex ring close to the piston end cover is provided with a sealing body clamping device with a concave section, and the opening of the sealing body clamping device is positioned at the end close to the piston end cover; the cover plate of the piston end cover is not contacted with the end, far away from the pull rod mounting sleeve, of the piston main body.
As the preferred technical scheme, the end of the piston rod, which is far away from the pull rod mounting sleeve, is provided with an annular step, and the end of the piston body, which is far away from the pull rod mounting sleeve, is in contact with the annular step.
As the preferred technical scheme, the pull rod sealing assembly comprises two ejector blocks and packing which are arranged between the pull rod and a pull rod mounting sleeve; the end of the pull rod installation sleeve, which is close to the valve box body, is in threaded connection with a pull rod installation sleeve end cover; the packing is arranged between the two jacking blocks; the pull rod mounting sleeve end cover is provided with a pull rod through hole, and the pull rod penetrates through the pull rod through hole; and a part of the ejector block close to the end of the valve box body extends out of the pull rod mounting sleeve and is contacted with the end cover of the pull rod mounting sleeve, and the ejector block far away from the inner cavity end of the valve box body is fixed in the pull rod mounting sleeve.
As the preferred technical scheme, the contact surfaces of the two jacking blocks and the packing are V-shaped.
As a preferred technical scheme, an annular convex ring is arranged on the radial inner circumferential surface of the pull rod mounting sleeve, which is far away from the end of the valve box body, and the top block, which is far away from the end of the valve box body, is in contact with the side, close to the valve box body, of the annular convex ring.
As a preferred technical scheme, the liquid inlet of each valve box component is respectively connected with a main liquid inlet pipe through a liquid inlet pipe, and the liquid outlet of each valve box component is connected with a liquid outlet pipe; two ends of the main liquid inlet pipe are provided with one side liquid inlet valve; the middle liquid inlet valve is connected to the position near each liquid inlet pipe on the main liquid inlet pipe through the middle liquid inlet pipe, and each liquid inlet pipe on the non-two ends of the main liquid inlet pipe and the middle liquid inlet pipe closest to the main liquid inlet pipe form a middle liquid inlet combination; control valves are arranged at two ends of each liquid inlet combination on the main liquid inlet pipe.
As the preferred technical scheme, the diameter of the corrugated pipe close to the pull rod mounting sleeve is larger than that of the other end of the corrugated pipe.
As the preferred technical scheme, the radial outer peripheral surface of the piston end cover is provided with the extrusion ring, and the sealing body is positioned between the extrusion ring and the convex ring.
As the preferred technical scheme, the sealing body is made of polyurethane; the elastic outer snap ring is made of rubber; the connecting piece is a connecting screw.
The utility model has the advantages that: the annular valve seat of the liquid outlet valve is connected with the annular valve seat of the liquid inlet valve through a compression spring, and the rigidity of the compression spring is greater than that of the compression spring of the liquid outlet valve and greater than that of the compression spring of the liquid inlet valve; when the flow is uneven and the pressure is unstable, the positions of the annular valve seat of the liquid inlet valve and the annular valve seat of the liquid outlet valve are elastically adjusted to achieve the effect of stabilizing the pump pressure, so that the use safety of components in the pump is well protected, and the service life of the slurry pump is prolonged. The exchange of single liquid, double liquid and multiple liquid is realized through the opening and closing of each control valve on the main liquid inlet pipe by the mud pump; the mixing of different proportions of the liquid is realized; the interchangeability of liquid mixing is facilitated.
The adjusting and connecting assembly comprises two connecting half sleeves, and the piston rod and the pull rod are quickly connected through quick disassembly of the two connecting half sleeves; the first connector and the second connector are hemispherical, and by adopting the structure, the coaxiality of the piston rod and the pull rod can be well adjusted, so that the disturbance of the pull rod to the pull rod sealing assembly and the piston to the plunger sealing assembly is reduced. Meanwhile, the piston rod and the pull rod are quickly disassembled, so that preparation can be made for replacing the piston or the metal sleeve.
When the contact pressure between the first sealing body and the wear-resistant layer of the metal sleeve needs to be adjusted, the piston is rotated to install the sleeve end cover, and the piston rod is dismounted; because the radial peripheral surface that the telescopic being close to pull rod installation cover end of metal is equipped with the boss, through sled the boss, can take out metal sleeve in the pull rod installation cover fast, realize the change to metal sleeve.
Because piston end cover and the pull rod installation sleeve end threaded connection that keeps away from of piston main part realize the extrusion to first seal and make first seal hug closely on metal telescopic wearing layer through the rotary piston end cover.
Drawings
Fig. 1 is a schematic structural view of the mud pump of the present invention.
Fig. 2 is a partially enlarged view of a portion a of fig. 1.
Fig. 3 is a partially enlarged view of a portion B of fig. 1.
FIG. 4 is a cross-sectional view of the mud pump of FIG. 1 taken along line C-C'.
Fig. 5 is a partially enlarged view of a portion D of fig. 4.
Fig. 6 is a partially enlarged view of a portion G of fig. 5.
Fig. 7 is a partially enlarged view of a portion H of fig. 5.
Fig. 8 is a partially enlarged view of a portion E of fig. 4.
Fig. 9 is a partially enlarged view of a portion F of fig. 4.
Wherein: a hydraulic end-1; a valve box body-11; a liquid inlet-12; a liquid outlet-13; an inner cavity-14 of the valve box body; a piston mounting sleeve-15; a liquid inlet valve-16; a liquid outlet valve-17; liquid inlet valve ring valve seat-161; the liquid inlet valve compresses the spring-162; a liquid inlet valve body-163; the liquid outlet valve compresses a spring-171; a liquid outlet valve body-172; a hold-down spring-173; an annular valve seat-174 of the liquid outlet valve;
a power end-2; a pull rod mounting sleeve-21;
a piston rod-3; an insertion hole-31; a piston-32; the piston is mounted on the end cover-33; a steel jacket-34; a boss-35; -36, a wear layer; piston end cap-37; a seal-38; a piston body-39; a convex ring-310; a seal body clamping device-311; an annular step-312; extrusion ring-313;
a pull rod-4;
an annular convex ring-5;
a bellows-6;
top block-71; the pull rod is provided with a sleeve end cover-72; packing-73;
adjusting the connecting component-8; connector-81; a second card slot-82; a first connector-83; a second connector-84; connecting the half sleeve-85; a first card slot-86;
a liquid inlet pipe-91; a total liquid inlet pipe-92; a liquid outlet pipe-93; side liquid inlet valve-94; flow control valve-95; medium liquid inlet pipe-96; middle liquid inlet valve-97.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1. 1-9, a piston mud pump employing a split piston assembly includes a fluid end 1 and a power end 2.
A plurality of liquid pumping systems are arranged between the liquid end 1 and the power end 2.
Each liquid pumping system comprises a valve box assembly, a pull rod mounting sleeve 21 and a transmission assembly; each valve box component is arranged on the hydraulic end 1, and each pull rod mounting sleeve 21 is arranged on the power end 2; the transmission assembly comprises a pull rod 4, a pull rod sealing assembly, a piston rod 3 and a piston 32.
The valve box assembly comprises a valve box body 11, a liquid inlet 12 and a liquid outlet 13 which are arranged on the side wall of the valve box body 11, and a valve box body inner cavity 14 arranged in the valve box body 11; the piston mounting sleeve 15 is arranged on the side wall of the valve box body 11 close to the pull rod mounting sleeve 21 and communicated with the valve box body inner cavity 14; the central axis of the piston mounting sleeve 15 is arranged transversely.
The end of each piston rod 3 far away from the pull rod mounting sleeve is positioned in the piston mounting sleeve 15, and the piston 32 is arranged at the end of the piston rod 3 far away from the pull rod mounting sleeve; be equipped with feed liquor valve 16, play liquid valve 17 in the valve box 11, feed liquor valve 16 links to each other with inlet 12, goes out liquid valve 17 and links to each other its characterized in that with liquid outlet 13:
the pull rod 4 is arranged on the pull rod mounting sleeve 21 through a pull rod sealing device; the pull rod 4 is connected with the piston rod 3 through an adjusting and connecting assembly 8.
The adjusting and connecting assembly 8 comprises two connecting half sleeves 85, a hemispherical first connecting head 83 is arranged at the end of the pull rod 4 close to the piston rod 3, and a hemispherical second connecting head 84 is arranged at the end of the piston rod 3 close to the pull rod 4; the central point connecting line of the first connector 83 and the second connector 84 is on the same straight line with the central axis of the piston rod 3; two ends of the two connecting half sleeves 85 are respectively provided with a first clamping groove 86 which is adaptive to the half part of the pull rod 4 close to the end of the piston rod 3 and the first connecting head 83 thereon, and a second clamping groove 82 which is adaptive to the half part of the piston rod 3 close to the end of the pull rod 4 and the second connecting head 84 thereon; the two connecting half sleeves 85 are butted together through the connecting piece 81 to form a butting structure which internally clamps the first connector 83 and the second connector 84 and externally has a cylindrical shape. Due to processing and installation errors, the piston rod plug and the pull rod are not completely coaxial, and by adopting the structure, the coaxiality of the piston rod and the pull rod can be automatically adjusted, abrasion caused by the fact that the piston rod and the pull rod are not coaxial is reduced, and the sealing performance of the slurry pump is improved.
A piston mounting sleeve end cover 33 is arranged at the end of the piston mounting sleeve 15 close to the pull rod mounting sleeve 21 in a threaded manner; a piston rod through hole is formed in the piston mounting sleeve end cover 33, and a butt joint structure formed by the two connecting half sleeves 85 penetrates through the piston rod through hole; the central axes of the pull rod 4, the piston rod 3 and the piston rod through hole are on the same straight line.
A steel sleeve 34 is sleeved in the piston mounting sleeve 15; the end of the steel sleeve 34 far away from the pull rod mounting sleeve 21 is in contact with the valve box body 11; a boss 35 is arranged on the radial peripheral surface of the steel sleeve 34 close to the end of the pull rod mounting sleeve 21; the end of the boss 35 close to the valve box body 11 is not contacted with the end of the piston mounting sleeve 15 far away from the valve box body 11; the radially inner peripheral surface of the steel sleeve 34 is provided with a wear-resistant layer 36; the end of the steel sleeve 34 close to the pull rod mounting sleeve 21 extends out of the piston mounting sleeve 15 and is in contact with the piston mounting sleeve end cover 33; the steel sleeve 34 is secured within the piston mounting sleeve 15 by rotating the piston mounting sleeve end cap 33.
The piston 32 comprises a piston end cover 37 arranged at the end of the piston rod 3 far away from the pull rod mounting sleeve 21, a sealing body 38 and a piston main body 39, wherein a convex ring 310 is arranged on the radial outer peripheral surface of the piston main body 39, and the sealing body 38 is positioned between the piston end cover 37 and the convex ring 310; the piston end cover 37 is screwed with the end of the piston main body 39 far from the pull rod mounting sleeve 21, and the sealing body 38 is pressed and tightly attached to the radial inner peripheral surface of the steel sleeve 34 by rotating the piston end cover 37.
A corrugated pipe 6 coaxial with the pull rod 4 is movably connected between the end of the pull rod 4 close to the valve box body 11 and the power end 2; the adjustment connection assembly 8 is located outside the bellows 6.
The liquid inlet 12 of each valve box assembly is connected with a total liquid inlet pipe 92 through a liquid inlet pipe 91, and the liquid outlet 13 of each valve box assembly is connected with a liquid outlet pipe 93; two ends of the total liquid inlet pipe 92 are provided with a side liquid inlet valve 94; flow control valves 95 are respectively arranged between the liquid inlet pipe 91 positioned in the middle of the three liquid inlet pipes 91 on the total liquid inlet pipe 92 and the liquid inlet pipes 91 on the two sides of the total liquid inlet pipe 92; a middle liquid inlet valve 97 is connected between the two flow control valves 95 on the main liquid inlet pipe 92 through a middle liquid inlet pipe 96.
The liquid inlet valve 16 comprises a liquid inlet valve annular valve seat 161, a liquid inlet valve hold-down spring 162 and a liquid inlet valve body 163, wherein the liquid inlet valve body 163 can seal the liquid inlet 12, and the liquid inlet valve annular valve seat 161 is connected with the liquid inlet valve annular valve seat 161 through the liquid inlet valve hold-down spring 162.
The liquid outlet valve 17 comprises a liquid outlet valve compression spring 171, a liquid outlet valve annular valve seat 174, a liquid outlet valve body 172 capable of sealing an inner hole of the liquid outlet valve annular valve seat 174, and a compression spring 173, wherein the liquid outlet valve annular valve seat 174 is connected with the valve box body 11 through the liquid outlet valve compression spring 171, and the liquid outlet 13 is arranged at the connection position of the liquid outlet valve compression spring 171 and the valve box body 11; outlet valve annular valve seat 174 is connected to inlet valve annular valve seat 161 by compression spring 173.
The cross section of the valve box inner cavity 14 is circular; the central axes of the inner cavity 14 of the valve box body, the annular valve seat 161 of the liquid inlet valve, the pressure spring 162 of the liquid inlet valve, the valve body 163 of the liquid inlet valve, the pressure spring 173, the annular valve seat 174 of the liquid outlet valve, the pressure spring 171 of the liquid outlet valve, the valve body 172 of the liquid outlet valve, the liquid inlet 12 and the liquid outlet 13 are on the same straight line; the stiffness of the hold-down spring 173 is greater than the stiffness of the outlet valve hold-down spring 171 and greater than the stiffness of the inlet valve hold-down spring 162.
The liquid inlet 12 of each valve box component is respectively connected with a liquid inlet pipe 91; the outlet port 13 of each valve box assembly is connected to an outlet pipe 93.
The outer diameter of the piston end cap 37 is smaller than the outer diameter of the convex ring 310; the end of the convex ring 310 close to the piston end cover 37 is provided with a sealing body clamping device 311 with a concave section, and the opening of the sealing body clamping device 311 is positioned at the end close to the piston end cover 37; the cover plate of the piston end cover 37 is not in contact with the end of the piston main body 39 far away from the pull rod mounting sleeve 21.
The end of the piston rod 3 away from the pull rod mounting sleeve 21 is provided with an annular step 312, and the end of the piston main body 39 away from the pull rod mounting sleeve 21 is in contact with the annular step 312.
The pull rod sealing assembly comprises two jacking blocks 71 and packing 73 which are arranged between the pull rod 4 and the pull rod mounting sleeve 21; a pull rod mounting sleeve end cover 72 is connected to the end, close to the valve box body 11, of the pull rod mounting sleeve 21 through threads; the packing 73 is arranged between the two jacking blocks 71; a pull rod through hole is formed in the pull rod mounting sleeve end cover 72, and the pull rod 4 penetrates through the pull rod through hole; the jacking block 71 close to the end of the valve box body partially extends out of the pull rod mounting sleeve 21 and is in contact with the pull rod mounting sleeve end cover 72, and the jacking block 71 far away from the inner cavity end of the valve box body is fixed in the pull rod mounting sleeve 21.
The contact surfaces of the two top blocks 71 and the packing 73 are V-shaped.
The radial inner peripheral surface of the pull rod mounting sleeve 21 far away from the valve box body end is provided with an annular convex ring 5, and the top block 71 far away from the valve box body end is contacted with the side, close to the valve box body, of the annular convex ring 5.
The liquid inlet 12 of each valve box assembly is connected with a total liquid inlet pipe 92 through a liquid inlet pipe 91, and the liquid outlet 13 of each valve box assembly is connected with a liquid outlet pipe 93; two ends of the total liquid inlet pipe 92 are provided with a side liquid inlet valve 94; the vicinity of each liquid inlet pipe 91 on the total liquid inlet pipe 92 is connected with a middle liquid inlet valve 97 through a middle liquid inlet pipe 96, and each liquid inlet pipe 91 on the non-two ends of the total liquid inlet pipe 92 and the middle liquid inlet pipe 96 nearest to the liquid inlet pipe form a middle liquid inlet combination; control valves 95 are provided at both ends of each liquid inlet combination on the total liquid inlet pipe 92.
The diameter of the corrugated pipe 6 close to the pull rod mounting sleeve 21 is larger than that of the other end thereof.
A pressing ring 313 is provided on the radially outer peripheral surface of the piston end cover 37, and a seal body 38 is located between the pressing ring 313 and the convex ring 310.
The liquid inlet 12 of each valve box assembly is connected with a total liquid inlet pipe 92 through a liquid inlet pipe 91, and the liquid outlet 13 of each valve box assembly is connected with a liquid outlet pipe 93; two ends of the total liquid inlet pipe 92 are provided with a side liquid inlet valve 94; flow control valves 95 are respectively arranged between the liquid inlet pipe 91 positioned in the middle of the three liquid inlet pipes 91 on the total liquid inlet pipe 92 and the liquid inlet pipes 91 on the two sides of the total liquid inlet pipe 92; a middle liquid inlet valve 97 is connected between the two flow control valves 95 on the main liquid inlet pipe 92 through a middle liquid inlet pipe 96.
The sealing body is made of polyurethane; the elastic outer snap ring is made of rubber; the connecting piece is a connecting screw.
The annular valve seat of the liquid outlet valve is connected with the annular valve seat 161 of the liquid inlet valve through a compression spring 173, and the rigidity of the compression spring 173 is greater than that of the compression spring 171 of the liquid outlet valve and greater than that of the compression spring 162 of the liquid inlet valve; when the flow is uneven and the pressure is unstable, the positions of the annular valve seat 161 of the liquid inlet valve and the annular valve seat 174 of the liquid outlet valve are elastically adjusted to achieve the effect of stabilizing the pumping pressure, so that the use safety of components in the pump is well protected, and the service life of the slurry pump is prolonged. The exchange of single liquid, double liquid and multiple liquid is realized by the slurry pump through the opening and closing of each control valve 95 on the total liquid inlet pipe 92; the mixing of different proportions of the liquid is realized; the interchangeability of liquid mixing is facilitated.
The adjusting and connecting assembly comprises two connecting half sleeves, and the piston rod and the pull rod are quickly connected through quick disassembly of the two connecting half sleeves; the first connector and the second connector are hemispherical, and by adopting the structure, the coaxiality of the piston rod and the pull rod can be well adjusted, so that the disturbance of the pull rod to the pull rod sealing assembly and the piston to the plunger sealing assembly is reduced. At the same time, the piston rod and the pull rod are quickly disassembled, ready for replacement of the piston or steel sleeve 34.
When the contact pressure between the sealing body 38 and the wear-resistant layer 36 of the steel sleeve 34 needs to be adjusted, the piston mounting sleeve end cover 33 is rotated, and the piston rod 3 is dismounted; because the radial peripheral surface of the steel sleeve 34 close to the end of the pull rod mounting sleeve 21 is provided with the boss 35, the steel sleeve 34 can be quickly taken out of the pull rod mounting sleeve 21 by prying the boss 35, and the steel sleeve 34 is replaced.
Due to the fact that the piston end cover 37 is in threaded connection with the end, far away from the pull rod mounting sleeve 21, of the piston main body 39, the piston end cover 37 is rotated to achieve extrusion of the sealing body 38, and the sealing body 38 is tightly attached to the wear-resistant layer 36 of the steel sleeve 34.
The above-mentioned embodiments are only for understanding the present invention, and are not intended to limit the technical solutions of the present invention, and those skilled in the relevant art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered by the scope of the claims of the present invention. The parts of the present invention not described in detail are the known techniques of those skilled in the art.
Claims (10)
1. A piston mud pump adopting a split type piston assembly comprises a hydraulic end (1) and a power end (2);
a plurality of liquid pumping systems are arranged between the liquid end (1) and the power end (2);
each liquid pumping system comprises a valve box component, a pull rod mounting sleeve (21) and a transmission component; each valve box component is arranged on the hydraulic end (1), and each pull rod mounting sleeve (21) is arranged on the power end (2); the transmission assembly comprises a pull rod (4), a pull rod sealing assembly, a piston rod (3) and a piston (32);
the valve box assembly comprises a valve box body (11), a liquid inlet (12) and a liquid outlet (13) which are arranged on the side wall of the valve box body (11), and a valve box body inner cavity (14) which is arranged in the valve box body (11); the piston mounting sleeve (15) is arranged on the side wall of the valve box body (11) close to the pull rod mounting sleeve (21) and communicated with the inner cavity (14) of the valve box body; the central axis of the piston mounting sleeve (15) is transversely arranged;
the end of each piston rod (3) far away from the pull rod mounting sleeve is positioned in the piston mounting sleeve (15), and the piston (32) is mounted at the end of the piston rod (3) far away from the pull rod mounting sleeve; be equipped with feed liquor valve (16), play liquid valve (17) in valve box (11), feed liquor valve (16) link to each other with inlet (12), go out liquid valve (17) and link to each other its characterized in that with liquid outlet (13):
the pull rod (4) is arranged on the pull rod mounting sleeve (21) through a pull rod sealing device; the pull rod (4) is connected with the piston rod (3) through an adjusting and connecting assembly (8);
the adjusting and connecting assembly (8) comprises two connecting half sleeves (85), a hemispherical first connecting head (83) is arranged at the end, close to the piston rod (3), of the pull rod (4), and a hemispherical second connecting head (84) is arranged at the end, close to the pull rod (4), of the piston rod (3); the connecting line of the central points of the first connector (83) and the second connector (84) and the central axis of the piston rod (3) are on the same straight line; two ends of the two connecting half sleeves (85) are respectively provided with a first clamping groove (86) which is matched with the end of the pull rod (4) close to the piston rod (3) and the half part of the first connecting head (83) on the pull rod, and a second clamping groove (82) which is matched with the end of the piston rod (3) close to the pull rod (4) and the half part of the second connecting head (84) on the pull rod; the two connecting half sleeves (85) are butted together through a connecting piece (81) to form a butting structure, the inner part of the butting structure clamps the first connecting head (83) and the second connecting head (84), and the outer part of the butting structure is cylindrical;
a piston mounting sleeve end cover (33) is arranged at the end of the piston mounting sleeve (15) close to the pull rod mounting sleeve (21) in a threaded manner; a piston rod through hole is formed in the piston mounting sleeve end cover (33), and a butt joint structure formed by the two connecting half sleeves (85) penetrates through the piston rod through hole; the central axes of the pull rod (4), the piston rod (3) and the piston rod through hole are on the same straight line;
a steel sleeve (34) is sleeved in the piston mounting sleeve (15); the end of the steel sleeve (34) far away from the pull rod mounting sleeve (21) is contacted with the valve box body (11); a boss (35) is arranged on the radial peripheral surface of the end, close to the pull rod mounting sleeve (21), of the steel sleeve (34); the end of the boss (35) close to the valve box body (11) is not contacted with the end of the piston mounting sleeve (15) far away from the valve box body (11); the radial inner peripheral surface of the steel sleeve (34) is provided with a wear-resistant layer (36); the end of the steel sleeve (34) close to the pull rod mounting sleeve (21) extends out of the piston mounting sleeve (15) and is contacted with the piston mounting sleeve end cover (33); the steel sleeve (34) is fixed in the piston mounting sleeve (15) by rotating the piston mounting sleeve end cover (33);
the piston (32) comprises a piston end cover (37) arranged at the end, far away from the pull rod mounting sleeve (21), of the piston rod (3), a sealing body (38) and a piston main body (39), a convex ring (310) is arranged on the radial outer peripheral surface of the piston main body (39), and the sealing body (38) is located between the piston end cover (37) and the convex ring (310); the piston end cover (37) is in threaded connection with the end, far away from the pull rod mounting sleeve (21), of the piston main body (39), the sealing body (38) is extruded by rotating the piston end cover (37), and the sealing body (38) is tightly attached to the radial inner peripheral surface of the steel sleeve (34);
a corrugated pipe (6) coaxial with the pull rod (4) is movably connected between the end of the pull rod (4) close to the valve box body (11) and the power end (2); the adjusting and connecting assembly (8) is positioned outside the corrugated pipe (6);
the liquid inlet (12) of each valve box component is connected with a total liquid inlet pipe (92) through a liquid inlet pipe (91), and the liquid outlet (13) of each valve box component is connected with a liquid outlet pipe (93); two ends of the main liquid inlet pipe (92) are provided with a side liquid inlet valve (94); flow control valves (95) are respectively arranged between the liquid inlet pipe (91) positioned in the middle of the three liquid inlet pipes (91) on the main liquid inlet pipe (92) and the liquid inlet pipes (91) on the two sides of the main liquid inlet pipe; a middle liquid inlet valve (97) is connected between the two flow control valves (95) on the main liquid inlet pipe (92) through a middle liquid inlet pipe (96);
the liquid inlet valve (16) comprises a liquid inlet valve annular valve seat (161), a liquid inlet valve pressing spring (162) and a liquid inlet valve body (163), the liquid inlet valve body (163) can seal the liquid inlet (12), and the liquid inlet valve annular valve seat (161) is connected with the liquid inlet valve annular valve seat (161) through the liquid inlet valve pressing spring (162);
the liquid outlet valve (17) comprises a liquid outlet valve compression spring (171), a liquid outlet valve annular valve seat (174), a liquid outlet valve body (172) capable of sealing an inner hole of the liquid outlet valve annular valve seat (174), and a compression spring (173), the liquid outlet valve annular valve seat (174) is connected with the valve box body (11) through the liquid outlet valve compression spring (171), and a liquid outlet (13) is formed at the connection position of the liquid outlet valve compression spring (171) and the valve box body (11); the liquid outlet valve annular valve seat (174) is connected with the liquid inlet valve annular valve seat (161) through a compression spring (173);
the cross section of the inner cavity (14) of the valve box body is circular; the central axes of the valve box inner cavity (14), the liquid inlet valve annular valve seat (161), the liquid inlet valve hold-down spring (162), the liquid inlet valve body (163), the hold-down spring (173), the liquid outlet valve annular valve seat (174), the liquid outlet valve hold-down spring (171), the liquid outlet valve body (172), the liquid inlet (12) and the liquid outlet (13) are on the same straight line; the rigidity of the pressing spring (173) is greater than that of the liquid outlet valve pressing spring (171) and greater than that of the liquid inlet valve pressing spring (162);
the liquid inlet (12) of each valve box component is respectively connected with a liquid inlet pipe (91); the liquid outlet (13) of each valve box component is connected with a liquid outlet pipe (93).
2. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: the outer diameter of the piston end cover (37) is smaller than that of the convex ring (310); the end of the convex ring (310) close to the piston end cover (37) is provided with a sealing body clamping device (311) with a concave section, and the opening of the sealing body clamping device (311) is positioned at the end close to the piston end cover (37); the cover plate of the piston end cover (37) is not contacted with the end of the piston main body (39) far away from the pull rod mounting sleeve (21).
3. The piston mud pump of claim 2, wherein the piston mud pump comprises a split piston assembly, and further comprising: an annular step (312) is arranged at the end of the piston rod (3) far away from the pull rod mounting sleeve (21), and the end of the piston main body (39) far away from the pull rod mounting sleeve (21) is in contact with the annular step (312).
4. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: the pull rod sealing assembly comprises two ejector blocks (71) and a packing (73) which are arranged between the pull rod (4) and the pull rod mounting sleeve (21); the end of the pull rod installation sleeve (21) close to the valve box body (11) is in threaded connection with a pull rod installation sleeve end cover (72); the packing (73) is arranged between the two jacking blocks (71); a pull rod through hole is formed in the pull rod mounting sleeve end cover (72), and the pull rod (4) penetrates through the pull rod through hole; a part of the top block (71) close to the end of the valve box body extends out of the pull rod mounting sleeve (21) and is in contact with the end cover (72) of the pull rod mounting sleeve, and the top block (71) far away from the inner cavity end of the valve box body is fixed in the pull rod mounting sleeve (21).
5. The piston mud pump of claim 4, wherein the piston mud pump comprises a split piston assembly, and further comprising: the contact surfaces of the two jacking blocks (71) and the packing (73) are V-shaped.
6. The piston mud pump of claim 4, wherein the piston mud pump comprises a split piston assembly, and further comprising: an annular convex ring (5) is arranged on the radial inner peripheral surface of the pull rod mounting sleeve (21) far away from the end of the valve box body, and a top block (71) far away from the end of the valve box body is contacted with the side, close to the valve box body, of the annular convex ring (5).
7. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: the liquid inlet (12) of each valve box component is connected with a total liquid inlet pipe (92) through a liquid inlet pipe (91), and the liquid outlet (13) of each valve box component is connected with a liquid outlet pipe (93); two ends of the main liquid inlet pipe (92) are provided with a side liquid inlet valve (94); the vicinity of each liquid inlet pipe (91) on the total liquid inlet pipe (92) is connected with a middle liquid inlet valve (97) through a middle liquid inlet pipe (96), and each liquid inlet pipe (91) on the non-two ends of the total liquid inlet pipe (92) and the middle liquid inlet pipe (96) nearest to the total liquid inlet pipe form a middle liquid inlet combination; control valves (95) are arranged at two ends of each liquid inlet combination on the total liquid inlet pipe (92).
8. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: the diameter of the corrugated pipe (6) close to the pull rod mounting sleeve (21) is larger than that of the other end of the corrugated pipe.
9. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: a squeezing ring (313) is arranged on the radial outer peripheral surface of the piston end cover (37), and the sealing body (38) is located between the squeezing ring (313) and the convex ring (310).
10. The piston mud pump of claim 1, wherein the piston mud pump comprises a split piston assembly, and further comprising: the sealing body is made of polyurethane; the elastic outer snap ring is made of rubber; the connecting piece is a connecting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922314720.6U CN212130692U (en) | 2019-12-20 | 2019-12-20 | Piston mud pump adopting split type piston assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922314720.6U CN212130692U (en) | 2019-12-20 | 2019-12-20 | Piston mud pump adopting split type piston assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212130692U true CN212130692U (en) | 2020-12-11 |
Family
ID=73667757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922314720.6U Active CN212130692U (en) | 2019-12-20 | 2019-12-20 | Piston mud pump adopting split type piston assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212130692U (en) |
-
2019
- 2019-12-20 CN CN201922314720.6U patent/CN212130692U/en active Active
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