CN210484027U - Piston sealing structure of plunger mud pump - Google Patents
Piston sealing structure of plunger mud pump Download PDFInfo
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- CN210484027U CN210484027U CN201921563905.4U CN201921563905U CN210484027U CN 210484027 U CN210484027 U CN 210484027U CN 201921563905 U CN201921563905 U CN 201921563905U CN 210484027 U CN210484027 U CN 210484027U
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Abstract
A piston sealing structure of a plunger mud pump comprises a piston sealing ring, a sealing ring pressing plate, a fixing piece, a piston rod and a piston body; the periphery of the piston body is provided with an annular boss extending outwards, and the piston body is provided with a body through hole for fixing the piston rod; the piston sealing ring is sleeved on the outer wall of the piston body, and the bottom surface of the piston sealing ring is contacted with the top surface of the annular boss; the outer wall of the piston sealing ring is sequentially provided with a conical sealing body and an annular guide ring from top to bottom; the conical sealing body is gradually narrowed inwards from the top to the bottom of the conical sealing body, and the diameter of the top surface of the conical sealing body is larger than that of the guide ring; the sealing washer clamp plate is equipped with the clamp plate through-hole that supplies the piston rod to fix, and the sealing washer clamp plate sets up in piston seal's top surface, the utility model provides a piston seal structure of plunger slush pump according to above-mentioned content, can prevent that the grit in the mud from getting into the friction surface of piston seal and mud cylinder liner better, protect the mud cylinder liner not worn and torn by the grit better.
Description
Technical Field
The utility model relates to a slush pump equipment technical field especially relates to a piston seal structure of plunger slush pump.
Background
The common sealing elements are used in the common plunger pumps, most manufacturers can adopt the common sealing elements, the common sealing elements are used in the slurry plunger pumps, and the working condition of slurry is special, the slurry contains a large amount of sand, and the common hydraulic sealing elements have no sand prevention function, so that the service life of the common hydraulic sealing elements is very short, the inner wall of a slurry cylinder sleeve cannot be well protected, sand in the slurry enters the friction surfaces of the sealing elements and the slurry cylinder sleeve, and the inner wall structure of the slurry cylinder sleeve is damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piston seal structure of plunger slush pump can prevent the grit in the mud to get into the friction surface of piston seal circle and mud cylinder liner better, protects the mud cylinder liner not worn and torn by the grit better.
To achieve the purpose, the utility model adopts the following technical proposal:
a piston sealing structure of a plunger mud pump comprises a piston sealing ring, a sealing ring pressing plate, a fixing piece, a piston rod and a piston body;
the periphery of the piston body is provided with an annular boss extending outwards, and the piston body is provided with a body through hole for fixing a piston rod;
the piston sealing ring is sleeved on the outer wall of the piston body, and the bottom surface of the piston sealing ring is contacted with the top surface of the annular boss;
the outer wall of the piston sealing ring is sequentially provided with a conical sealing body and an annular guide ring from top to bottom;
the conical sealing body is gradually narrowed inwards from the top to the bottom of the conical sealing body, and the diameter of the top surface of the conical sealing body is larger than that of the guide ring;
the piston sealing ring pressing plate is provided with a pressing plate through hole for fixing the piston rod, the sealing ring pressing plate is arranged on the top surface of the piston sealing ring, and the sealing ring pressing plate is fixed on the piston body through a fixing piece so as to enable the sealing ring pressing plate to tightly press the piston sealing ring;
the central axes of the body through hole and the pressing plate through hole are superposed, and the piston rod passes through and is fixed in the body through hole and the pressing plate through hole.
Further, the top surface of the piston sealing ring is provided with a groove, the sealing ring pressing plate is arranged in the groove, and the bottom surface of the sealing ring pressing plate is in contact with the top surface of the groove.
Further, the fixing pieces are screws, and the number of the fixing pieces is at least two;
and screw holes for fixing the fixing piece are respectively formed in the tops of the sealing ring pressing plate and the piston body.
Further, the piston body is made of a hard metal.
Further, the piston sealing ring is made of soft colloid.
Furthermore, the number of the guide rings is two, the guide rings are respectively a first guide ring and a second guide ring, and an annular spacing groove is formed between the first guide ring and the second guide ring.
Furthermore, the outer edge of the guide ring protrudes out of the outer edge of the annular boss.
The utility model provides a piston seal structure of plunger slush pump according to above-mentioned content can prevent the grit in the mud to get into the friction surface of piston seal circle and mud cylinder liner better, protects the mud cylinder liner not worn and torn by the grit better.
In the actual use process, the piston sealing structure is used in a mud cylinder sleeve; the diameter of the guide ring is the same as the inner diameter of the slurry cylinder sleeve, so that the guide ring plays a role in guiding the piston sealing structure to move in the slurry cylinder sleeve.
The diameter of the top surface of the conical seal body is larger than the inner diameter of the slurry cylinder sleeve, so that when the slurry cylinder sleeve is assembled, the inner wall of the slurry cylinder sleeve is extruded, the conical seal body deforms, the conical seal body after deformation is attached to the inner wall of the slurry cylinder sleeve all the time, therefore, the conical seal body can better prevent gravel in slurry from entering the friction surface of the piston seal ring and the slurry cylinder sleeve, and the slurry cylinder sleeve is better protected from being abraded by the gravel.
Through the mode that the piston seal ring is fixed in the piston body by the seal ring pressing plate, on one hand, the piston seal ring is convenient to replace, and on the other hand, the piston seal ring can be tightly pressed on the annular boss of the piston body, so that the piston seal ring is not easy to fall off when in use.
The central axes of the body through hole and the pressing plate through hole are coincident, so that the piston rod is more convenient to fix in the body through hole and the pressing plate through hole, and the whole structure of the piston sealing structure is more compact. The piston rod and the through hole of the body and the through hole of the pressing plate can be fixed in a threaded manner, namely threads are arranged at the positions where the piston rod and the through hole of the body and the through hole of the pressing plate are fixed. The piston rod drives the whole piston sealing structure to reciprocate in the slurry cylinder sleeve, so that slurry can be continuously sucked and discharged, and the purpose of conveying the slurry is achieved.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic partial structure diagram of one embodiment of the present invention;
fig. 3 is a schematic partial structure diagram of one embodiment of the present invention in use.
Wherein: the piston sealing ring comprises a piston sealing ring 1, a groove 11, a spacing groove 101, a sealing ring pressing plate 2, a pressing plate through hole 21, a fixing piece 3, a piston rod 4, a piston body 5, an annular boss 51, a body through hole 52, a conical sealing body 6, a first guide ring 7, a second guide ring 8 and a slurry cylinder sleeve 9.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1-3, a piston sealing structure of a plunger mud pump comprises a piston sealing ring 1, a sealing ring pressing plate 2, a fixing piece 3, a piston rod 4 and a piston body 5;
the periphery of the piston body 5 is provided with an annular boss 51 extending outwards, and the piston body 5 is provided with a body through hole 52 for fixing the piston rod 4;
the piston sealing ring 1 is sleeved on the outer wall of the piston body 5, and the bottom surface of the piston sealing ring 1 is in contact with the top surface of the annular boss 51;
the outer wall of the piston sealing ring 1 is sequentially provided with a conical sealing body 6 and an annular guide ring from top to bottom;
the conical sealing body 6 is gradually narrowed inwards from the top to the bottom thereof, and the diameter of the top surface of the conical sealing body 6 is larger than that of the guide ring;
the sealing ring pressing plate 2 is provided with a pressing plate through hole 21 for fixing the piston rod 4, the sealing ring pressing plate 2 is arranged on the top surface of the piston sealing ring 1, and the sealing ring pressing plate 2 is fixed on the piston body 5 through a fixing piece 3, so that the sealing ring pressing plate 2 tightly presses the piston sealing ring 1;
the central axes of the body through hole 52 and the pressing plate through hole 21 are coincident, and the piston rod 4 passes through and is fixed in the body through hole 52 and the pressing plate through hole 21.
In the actual use process, the piston sealing structure is used in the slurry cylinder sleeve 9; the diameter of the guide ring is the same as the inner diameter of the mud cylinder sleeve 9, so that the guide ring plays a role in guiding the piston sealing structure to move in the mud cylinder sleeve 9.
The diameter of the top surface of the conical sealing body 6 is greater than the inner diameter of the slurry cylinder sleeve 9, so that when the assembly is carried out, the inner wall of the slurry cylinder sleeve 9 is extruded, the conical sealing body 6 deforms, the conical sealing body 6 after deformation is always attached to the inner wall of the slurry cylinder sleeve 9, and therefore the conical sealing body 6 can better prevent gravel in slurry from entering the friction surface of the piston sealing ring 1 and the slurry cylinder sleeve 9, and the slurry cylinder sleeve 9 is better protected from being abraded by the gravel.
Through the mode that sealing washer clamp plate 2 is fixed in piston seal 1 piston body 5, on the one hand, conveniently change piston seal 1, on the other hand also enables piston seal 1 compresses tightly on piston body 5's annular boss 51, makes piston seal 1 is difficult to drop when using.
The central axes of the body through hole 52 and the pressing plate through hole 21 are overlapped, so that the piston rod 4 is more conveniently fixed with the body through hole 52 and the pressing plate through hole 21, and the whole structure of the piston sealing structure is more compact. The piston rod 4 and the inner part of the body through hole 52 and the pressing plate through hole 21 can be fixed by threads, that is, the positions where the piston rod 4 and the inner part of the body through hole 52 and the pressing plate through hole 21 are fixed are provided with threads. The piston rod 4 drives the whole piston sealing structure to reciprocate in the slurry cylinder sleeve 9, so that slurry can be continuously sucked and discharged, and the purpose of conveying the slurry is achieved.
Further, a groove 11 is formed in the top surface of the piston sealing ring 1, the sealing ring pressing plate 2 is arranged in the groove 11, and the bottom surface of the sealing ring pressing plate 2 is in contact with the top surface of the groove 11.
The groove 11 is formed, and the sealing ring pressing plate 2 is arranged in the groove 11, so that the piston sealing structure is more compact on the whole.
Further, the fixing pieces 3 are screws, and the number of the fixing pieces 3 is at least two;
and screw holes for fixing the fixing piece 3 are respectively formed in the tops of the sealing ring pressing plate 2 and the piston body 5.
Through the fixed mode of screw, can realize quick dismouting sealing washer clamp plate 2 to realize quick replacement piston seal ring 1, the quantity of mounting 3 is two at least, can compress tightly piston seal ring 1 on the annular boss 51 of piston body 5 more steadily through mounting 3 of at least two.
Further, the piston body 5 is made of a hard metal.
For example, the piston body 5 is made of steel, and has a long service life.
Further, the piston seal ring 1 is made of soft rubber.
Because the piston seal ring 1 can make back and forth contact with the inner wall of the slurry cylinder sleeve 9 when in use, the piston seal ring 1 made of soft colloid has better sealing effect and is not easy to abrade the inner wall of the slurry cylinder sleeve 9. For example, the piston seal ring 1 may be made of rubber, and the hardness of the piston seal ring is more than 85 units of shore hardness.
Further, the number of the guide rings is two, the guide rings are respectively a first guide ring 7 and a second guide ring 8, and an annular spacing groove 101 is arranged between the first guide ring 7 and the second guide ring 8.
Through the arrangement of the first guide ring 7 and the second guide ring 8, the effect of guiding the piston sealing structure to move in the mud cylinder sleeve 9 is better, and the first guide ring 7 and the second guide ring 8 are spaced by the arrangement of the spacing groove 101, so that the functions of the first guide ring 7 and the second guide ring 8 for guiding the piston sealing structure are mutually independent.
Further, the outer edge of the guide ring protrudes out of the outer edge of the annular boss 51.
Because the annular boss 51 of the piston body 5 is made of hard metal, such as steel, the outer edge of the guide ring is arranged to protrude from the outer edge of the annular boss 51, so that the hard outer edge of the annular boss 51 can be prevented from contacting with the inner wall of the mud cylinder sleeve 9, and the inner wall of the mud cylinder sleeve 9 is protected from being abraded by the outer edge of the annular boss 51.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (7)
1. A piston seal structure of plunger slush pump which characterized in that: the piston comprises a piston sealing ring, a sealing ring pressing plate, a fixing piece, a piston rod and a piston body;
the periphery of the piston body is provided with an annular boss extending outwards, and the piston body is provided with a body through hole for fixing a piston rod;
the piston sealing ring is sleeved on the outer wall of the piston body, and the bottom surface of the piston sealing ring is contacted with the top surface of the annular boss;
the outer wall of the piston sealing ring is sequentially provided with a conical sealing body and an annular guide ring from top to bottom;
the conical sealing body is gradually narrowed inwards from the top to the bottom of the conical sealing body, and the diameter of the top surface of the conical sealing body is larger than that of the guide ring;
the piston sealing ring pressing plate is provided with a pressing plate through hole for fixing the piston rod, the sealing ring pressing plate is arranged on the top surface of the piston sealing ring, and the sealing ring pressing plate is fixed on the piston body through a fixing piece so as to enable the sealing ring pressing plate to tightly press the piston sealing ring;
the central axes of the body through hole and the pressing plate through hole are superposed, and the piston rod passes through and is fixed in the body through hole and the pressing plate through hole.
2. The piston seal structure for a plunger mud pump as set forth in claim 1, wherein: the piston sealing ring is characterized in that a groove is formed in the top surface of the piston sealing ring, the sealing ring pressing plate is arranged in the groove, and the bottom surface of the sealing ring pressing plate is in contact with the top surface of the groove.
3. The piston seal structure for a plunger mud pump as set forth in claim 1, wherein: the fixing pieces are screws, and the number of the fixing pieces is at least two;
and screw holes for fixing the fixing piece are respectively formed in the tops of the sealing ring pressing plate and the piston body.
4. The piston seal structure for a plunger mud pump as set forth in claim 1, wherein: the piston body is made of a hard metal.
5. The piston seal structure for a plunger mud pump as set forth in claim 1, wherein: the piston sealing ring is made of soft colloid.
6. The piston seal structure for a plunger mud pump as set forth in claim 1, wherein: the number of the guide rings is two, the guide rings are respectively a first guide ring and a second guide ring, and an annular spacing groove is formed between the first guide ring and the second guide ring.
7. The piston seal structure for a plunger mud pump as set forth in claim 6, wherein: the outer edge of the guide ring protrudes out of the outer edge of the annular boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921563905.4U CN210484027U (en) | 2019-09-19 | 2019-09-19 | Piston sealing structure of plunger mud pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921563905.4U CN210484027U (en) | 2019-09-19 | 2019-09-19 | Piston sealing structure of plunger mud pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210484027U true CN210484027U (en) | 2020-05-08 |
Family
ID=70540681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921563905.4U Active CN210484027U (en) | 2019-09-19 | 2019-09-19 | Piston sealing structure of plunger mud pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210484027U (en) |
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2019
- 2019-09-19 CN CN201921563905.4U patent/CN210484027U/en active Active
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