CN210599377U

CN210599377U - Sealing device for plunger of high-pressure mud pump

Info

Publication number: CN210599377U
Application number: CN201921182952.4U
Authority: CN
Inventors: 张祥来; 杨帆; 崔少华; 张斌
Original assignee: Tianjin Juqiang High Pressure Pump Co ltd
Current assignee: Tianjin Juqiang High Pressure Pump Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-05-22
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a sealing device of high pressure slush pump plunger, which comprises a pump body, the right side welding of the pump body has the anchorage, first rubber circle is installed to the top of the pump body, the left side welding of anchorage has the pump cover, the top welding of pump cover has the lubricating oil storehouse, the second rubber circle has been installed to the top of lubricating oil storehouse, the outside cover of lubricating oil storehouse is equipped with lubricating oil storehouse lid, the top of pump cover is inlayed and is had first L shape sealing ring, the inside of first L shape sealing ring is pegged graft and is had the plunger. The utility model discloses a set up the annular block cover and establish on the plunger, when the plunger upward movement, under the drive of pressure, second L shape sealing ring atress takes place elastic deformation and pastes the junction of tight annular block and plunger, and the annular block receives the atress upward movement, upwards compresses tightly first L shape sealing ring for elastic deformation takes place for first L shape sealing ring, pastes and obtains the junction between tight pump cover and the plunger.

Description

Sealing device for plunger of high-pressure mud pump

Technical Field

The utility model relates to a slush pump equipment technical field specifically is a sealing device of high pressure slush pump plunger.

Background

The mud pump is a machine for conveying flushing fluid such as mud or water into a drill hole in the drilling process, the mud pump is an important component of drilling equipment, the plunger of the mud pump reciprocates for a long time during working, a sealing device of the plunger of the mud pump is easy to wear, the sealing performance of the plunger of the mud pump is poor, and therefore the working efficiency of the pump is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealing device of high pressure slush pump plunger to solve the present slush pump leakproofness that above-mentioned background art provided not good, influence the work efficiency of pump, and the too much problem of being not convenient for dismantle the maintenance of internals.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a sealing device of high pressure slush pump plunger, includes the pump body, the right side welding of the pump body has the fastening bolt, first rubber circle is installed to the top of the pump body, the left side welding of fastening bolt has the pump cover, the top welding of pump cover has the lubricating oil storehouse, the second rubber circle has been installed to the top of lubricating oil storehouse, the outside cover in lubricating oil storehouse is equipped with the lubricating oil cang gai, the top of pump cover is inlayed and is had first L shape sealing ring, the inside grafting of first L shape sealing ring has the plunger, the outside cover of plunger is equipped with the annular piece, the outside cover of annular piece is equipped with the spacing collar, the bottom of annular piece is fixed with second L shape sealing ring, the below cover of plunger is equipped with buffer spring.

Preferably, the inner wall of the pump cover is provided with threads, the outer wall of the top of the pump body is provided with threads, and the pump cover is connected with the pump body through the threads.

Preferably, the fastening bolts comprise a first fastening block, a rubber pad and a second fastening block, the rubber pad is fixed below the first fastening block, the second fastening block is fixed below the rubber pad, four groups of fastening bolts are arranged, and the four groups of fastening bolts are uniformly welded at the joint of the pump body and the pump cover.

Preferably, the inner wall of the lubricating oil bin cover is provided with threads, the outer wall of the lubricating oil bin is provided with threads, and the lubricating oil bin cover is connected with the lubricating oil bin through the threads.

Preferably, the outer side of the limiting ring is embedded in a clamping groove formed in the inner wall of the pump cover, and the inner side of the limiting ring is sleeved in a clamping groove formed in the outer wall of the annular block.

Preferably, the second L-shaped sealing ring is fixed in a groove formed in the bottom of the annular block through a rivet, and the inner side of the second L-shaped sealing ring is the same as the outer side of the plunger.

Compared with the prior art, the beneficial effects of the utility model are that: according to the sealing device of the plunger of the high-pressure mud pump, the pump cover and the pump body are in threaded connection, and the first rubber ring is arranged between the pump cover and the pump body, so that the sealing performance between the pump cover and the pump body is guaranteed;

the annular block is arranged on the plunger in a sleeved mode, when the plunger moves upwards, under the driving of pressure, the second L-shaped sealing ring is stressed to generate elastic deformation and tightly attached to the joint of the annular block and the plunger, the annular block moves upwards under the stress and tightly presses the first L-shaped sealing ring upwards, the first L-shaped sealing ring is elastically deformed, and the joint is tightly attached to the position between the pump cover and the plunger;

establish on the plunger through setting up the buffer spring cover, when the plunger upward movement suddenly, elastic deformation can take place for buffer spring, weakens the impact, prevents that the bottom of plunger from striking the top of pump cover suddenly, leads to the slush pump to damage, has prolonged the life of this slush pump greatly.

Drawings

FIG. 1 is a schematic sectional view of the front view of the structure of the present invention;

FIG. 2 is a schematic top view of the structure of the present invention;

fig. 3 is a schematic side view of the fastening bolt of the present invention.

In the figure: 1. a pump body; 2. fastening bolts; 21. a first fastening block; 22. a rubber pad; 23. a second fastening block; 3. a first rubber ring; 4. a pump cover; 5. a lubricating oil bin; 6. a second rubber ring; 7. lubricating the oil sump cover; 8. a first L-shaped seal ring; 9. a plunger; 10. a ring block; 11. a limiting ring; 12. a second L-shaped sealing ring; 13. a buffer spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides a sealing device of high pressure slush pump plunger, including the pump body 1, the right side welding of the pump body 1 has fastening bolt 2, fastening bolt 2 includes first fastening block 21, rubber pad 22 and second fastening block 23, the below of first fastening block 21 is fixed with rubber pad 22, the below of rubber pad 22 is fixed with second fastening block 23, fastening bolt 2 is provided with four groups altogether, the even welding of four groups of fastening bolt 2 is in the junction of the pump body 1 and pump cover 4, fasten pump cover 4 and the pump body 1 through fastening bolt 2, make the device leakproofness better, prevent to lead to pump cover 4 not hard up with the junction of the pump body 1 because vibrations at the high pressure slush pump during operation.

First rubber circle 3 is installed to the top of the pump body 1, the left side welding of anchorage 2 has pump cover 4, set up the screw thread on the inner wall of pump cover 4, set up the screw thread on the top outer wall of the pump body 1, pump cover 4 passes through the screw thread and is connected with pump body 1, through threaded connection pump cover 4 and pump body 1, be convenient for just can open this high pressure slush pump through rotating pump cover 4, be convenient for overhaul and change the part of inside, and first rubber circle 3 has been installed in the junction of pump cover 4 and pump body 1, make first rubber circle 3 take place elastic deformation through the extrusion of pump cover 4 and pump body 1, thereby sealed pump cover 4 and pump body 1's junction, ensure the good leakproofness of this slush pump.

The welding of the top of pump cover 4 has lubricating oil storehouse 5, second rubber circle 6 has been installed to the top of lubricating oil storehouse 5, the outside cover of lubricating oil storehouse 5 is equipped with lubricating oil storehouse cover 7, the interior jade of lubricating oil storehouse cover 7 is threaded, the outer wall of lubricating oil storehouse 5 is threaded, lubricating oil storehouse cover 7 passes through the screw thread and is connected with lubricating oil storehouse 5, can open lubricating oil storehouse cover 7 through rotatory lubricating oil storehouse cover 7, be convenient for change the inside lubricating oil of lubricating oil storehouse 5, and second rubber circle 6 is because lubricating oil storehouse cover 7 takes place elastic deformation with the centre gripping of lubricating oil storehouse 5, live the clearance seal between lubricating oil storehouse cover 7 and plunger 9.

Inlay at the top of pump cover 4 has first L shape sealing ring 8, it has plunger 9 to peg graft in the inside of first L shape sealing ring 8, the outside cover of plunger 9 is equipped with annular block 10, the outside cover of annular block 10 is equipped with spacing collar 11, inlay in the draw-in groove of seting up on pump cover 4 inner wall in the outside of spacing collar 11, the draw-in groove of seting up on annular block 10 outer wall is established to the inboard cover of spacing collar 11, spacing collar 11 fixes annular block 10 in the below of pump cover 4, when plunger 9 moves up, the space of the pump body 1 inside diminishes, gaseous pressure grow, make the laminating of annular block 10 in the bottom of pump cover 4, annular block 10 compresses tightly first L shape sealing ring 8, make first L shape sealing ring 8 take place elastic deformation, thereby make first L shape sealing ring 8 seal up the clearance of pump cover 4 and plunger 9, guarantee the leakproofness of this slush pump.

The bottom of the annular block 10 is fixed with a second L-shaped sealing ring 12, a buffer spring 13 is sleeved below the plunger 9, the second L-shaped sealing ring 12 is fixed in a groove formed in the bottom of the annular block 10 through a rivet, the inside size of the second L-shaped sealing ring 12 is the same as the outside size of the plunger 9, the plunger 9 moves upwards, the pressure inside the pump body 1 is increased, the second L-shaped sealing ring 12 is tightly attached to the groove in the bottom of the annular block 10, so that a gap between the annular block 10 and the plunger 9 is sealed, if the upward stroke of the plunger 9 is too large, the bottom of the plunger 9 impacts the buffer spring 13 to generate elastic deformation, the impact force at the bottom of the plunger 9 is weakened, the bottom of the plunger 9 is prevented from directly impacting the annular block 10 to cause deformation of the annular block 10, and the annular block 10 is prevented from deforming to cause poor sealing performance of the slurry.

The working principle is as follows: when the slurry pump works, the plunger 9 is pulled upwards, the space inside the pump body 1 is reduced to cause air pressure to be increased, under the pressing of pressure, the second L-shaped sealing ring 12 is elastically deformed, so that the second L-shaped sealing ring 12 is attached to the joint of the annular block 10 and the plunger 9 to seal a gap at the joint, the annular block 10 is pressed by the pressure inside the pump body 1 to move upwards slightly, the annular block 10 presses the first L-shaped sealing ring 8 into the clamping groove at the bottom of the pump cover 4, the first L-shaped sealing ring 8 is elastically deformed to block the gap between the pump cover 4 and the plunger 9 to ensure the sealing performance of the slurry pump, lubricating oil inside the lubricating oil bin 5 is uniformly coated on the surface of the plunger 9 during the up-and-down movement of the plunger 9 to play a lubricating role, and the second rubber ring 6 arranged between the lubricating oil bin cover 7 and the lubricating oil bin 5 is deformed by the extrusion of the lubricating oil bin cover 7, the joint of the lubricating oil bin cover 7 and the plunger 9 is filled to prevent the lubricating oil from leaking;

when the plunger 9 moves upwards, if the movement stroke of the plunger 9 is too large, the buffer spring 13 sleeved on the plunger 9 can generate elastic deformation to weaken the impact force, so that the bottom of the plunger 9 is prevented from directly impacting the annular block 10, the annular block 10 is prevented from being deformed and damaged, and the sealing performance of the high-pressure slurry pump is prevented from being influenced by the deformation of the annular block 10;

when needing to overhaul or change this high pressure slush pump internals, the bolt that the cover was established on the anticlockwise rotation fastening bolt 2 takes out the bolt, then anticlockwise rotation pump cover 4 can be opened pump cover 4, maintains the change to the pump internals, if when will adding lubricating oil, anticlockwise rotation lubricating oil storehouse lid 7, with lubricating oil storehouse lid 7 open, toward install additional in the second rubber circle 6 lubricating oil can.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A sealing device for a plunger of a high-pressure mud pump comprises a pump body (1), and is characterized in that: a fastening bolt (2) is welded on the right side of the pump body (1), a first rubber ring (3) is arranged above the pump body (1), a pump cover (4) is welded on the left side of the fastening bolt (2), a lubricating oil bin (5) is welded above the pump cover (4), a second rubber ring (6) is arranged above the lubricating oil bin (5), a lubricating oil bin cover (7) is sleeved outside the lubricating oil bin (5), a first L-shaped sealing ring (8) is embedded at the top of the pump cover (4), a plunger (9) is inserted into the first L-shaped sealing ring (8), the outer side of the plunger (9) is sleeved with an annular block (10), the outer side of the annular block (10) is sleeved with a limiting ring (11), and a second L-shaped sealing ring (12) is fixed at the bottom of the annular block (10), and a buffer spring (13) is sleeved below the plunger (9).

2. The seal assembly for a plunger of a high pressure mud pump of claim 1, wherein: the pump cover is characterized in that the inner wall of the pump cover (4) is provided with threads, the outer wall of the top of the pump body (1) is provided with threads, and the pump cover (4) is connected with the pump body (1) through the threads.

3. The seal assembly for a plunger of a high pressure mud pump of claim 1, wherein: fastening bolt (2) include first fastening piece (21), rubber pad (22) and second fastening piece (23), the below of first fastening piece (21) is fixed with rubber pad (22), the below of rubber pad (22) is fixed with second fastening piece (23), fastening bolt (2) are provided with four groups altogether, four groups fastening bolt (2) evenly weld the junction at the pump body (1) and pump cover (4).

4. The seal assembly for a plunger of a high pressure mud pump of claim 1, wherein: the lubricating oil bin is characterized in that the inner wall of the lubricating oil bin cover (7) is provided with threads, the outer wall of the lubricating oil bin (5) is provided with threads, and the lubricating oil bin cover (7) is connected with the lubricating oil bin (5) through the threads.

5. The seal assembly for a plunger of a high pressure mud pump of claim 1, wherein: the outer side of the limiting ring (11) is embedded in a clamping groove formed in the inner wall of the pump cover (4), and the inner side of the limiting ring (11) is sleeved in the clamping groove formed in the outer wall of the annular block (10).

6. The seal assembly for a plunger of a high pressure mud pump of claim 1, wherein: the second L-shaped sealing ring (12) is fixed in a groove formed in the bottom of the annular block (10) through a rivet, and the inner side size of the second L-shaped sealing ring (12) is the same as the outer side size of the plunger (9).