CN215333372U

CN215333372U - Sealing device for plunger of high-pressure mud pump

Info

Publication number: CN215333372U
Application number: CN202121376975.6U
Authority: CN
Inventors: 齐士鹏; 张润程; 赵杰
Original assignee: QINGDAO SHUANGSHENGHAI NEW ENERGY TECHNOLOGY CO LTD
Current assignee: QINGDAO SHUANGSHENGHAI NEW ENERGY TECHNOLOGY CO LTD
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-12-28
Anticipated expiration: 2031-06-21

Abstract

The utility model discloses a sealing device of a high-pressure slurry pump plunger, which comprises a pump box, wherein the top wall of the pump box is connected with a plunger body in a penetrating and sliding manner, a sealing gasket is fixedly glued at the joint of the plunger body and the top wall of the pump box, a limiting ring is fixedly welded on the inner wall of the pump box, the top wall of the limiting ring is propped against a sealing ring, the inner aperture of the sealing ring is matched with the size of the plunger body and is connected with the plunger body in a sealing and sliding manner, and a plurality of sliding blocks are fixedly welded on the circumference of the inner wall of the pump box at equal intervals. According to the utility model, by arranging the structures such as the sealing gasket and the sealing ring, when the pump body works to pump the plunger body, the sealing ring moves upwards to extrude the sealing gasket through the increase of the air pressure in the pump box, so that the sealing gasket extends to seal the gap between the plunger body and the pump box, the phenomenon that slurry enters and damages the pump body is avoided, and the service life of the pump body is shortened.

Description

Sealing device for plunger of high-pressure mud pump

Technical Field

The utility model relates to the technical field of plunger body sealing, in particular to a sealing device for a plunger of a high-pressure mud pump.

Background

A mud pump is a machine that delivers a flushing fluid, such as mud or water, into a borehole during the drilling process, and is an important component of a drilling apparatus.

However, the plunger body of the mud pump reciprocates for a long time during working, the sealing device of the plunger body of the mud pump is easy to wear, the sealing performance of the plunger body of the mud pump is poor, and mud enters the pump body to influence the service life of the pump body.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a sealing device for a plunger of a high-pressure mud pump.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a sealing device of high pressure slush pump plunger, includes the pump box, the roof of pump box runs through sliding connection and has the plunger body, the junction veneer with the pump box roof of plunger body is fixed with sealed the pad, the inner wall welded fastening of pump box has the spacing ring, the roof of spacing ring offsets there is the sealing ring, the internal aperture of sealing ring cooperatees with the size of a dimension of plunger body, and with the sealed sliding connection of plunger body, the inner wall circumference equidistant welded fastening of pump box has a plurality of sliding blocks, a plurality of first sliding tray has been seted up to the outer wall circumference equidistant of sealing ring, and is a plurality of the sliding block is with a plurality of first sliding tray one-to-one and respectively rather than corresponding first sliding tray sliding connection, be provided with buffer on the sealing ring.

Preferably, buffer is including a plurality of cavitys, and is a plurality of the diapire at the sealing ring is seted up to the equidistant seting up of cavity circumference, the second sliding tray has been seted up to the equal symmetry of diapire of cavity, equal sliding connection has the snubber block in the second sliding tray, the lateral wall symmetry welded fastening of cavity has two first springs, two the other end of first spring and the lateral wall welded fastening of its corresponding snubber block.

Preferably, two the diapire of snubber block all rotates and is connected with the dwang, the other end of dwang rotates jointly and is connected with the sliding seat, the sliding seat run through the diapire of cavity and with the diapire sliding connection of cavity, the diapire welded fastening of sliding seat has the telescopic link, the free end welded fastening of telescopic link has the touch block, the cover is equipped with the second spring on the telescopic link.

Preferably, one end of the second spring is welded and fixed with the bottom wall of the sliding seat, and the other end of the second spring is welded and fixed with the touch block.

Preferably, the sealing gasket is made of an elastic material, and the touch block is made of a rubber material.

Preferably, the top wall of the sealing ring is abutted against the bottom wall of the sealing gasket, and the number of the touch blocks is not less than six.

Compared with the prior art, the utility model has the advantages that:

1. through setting up sealing ring and spacing ring isotructure for when the pump body carries out the during operation, the plunger body is upwards twitched, and the volume of pump incasement diminishes this moment, and atmospheric pressure increases, thereby makes upwards push up the sealing ring and extrudees sealed the pad, and sealed pad will make to lengthen under self elastic effect after receiving the extrusion and plug up the gap of being connected between plunger body and the pump case, avoids mud to get into the life who damages the pump body.

2. Through setting up first spring and second spring isotructure, when plunger body upward movement's range is great, the bottom of plunger body can touch at first and touch the piece to will come from the impact force of plunger body bottom under the combined action of first spring and second spring and weaken, thereby avoid the impact force of plunger body bottom to damage the sealing ring, avoid causing the harm to the device.

Drawings

FIG. 1 is a schematic structural diagram of a sealing device for a plunger of a high-pressure mud pump according to the present invention;

FIG. 2 is an enlarged schematic view of part A of the sealing device for the plunger of the high pressure mud pump according to the present invention;

fig. 3 is a schematic structural diagram of a sealing device of a plunger of a high-pressure mud pump according to the present invention, and is a top sectional view.

In the figure: 1 pump box, 2 plunger bodies, 3 sealed pad, 4 spacing rings, 5 sealing rings, 6 sliding blocks, 7 first sliding grooves, 8 cavities, 9 second sliding grooves, 10 shock-absorbing blocks, 11 first springs, 12 rotating rods, 13 sliding seats, 14 telescopic rods, 15 second springs and 16 touch blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a sealing device for a high pressure slurry pump plunger comprises a pump box 1, the top wall of the pump box 1 is connected with a plunger body 2 in a penetrating and sliding manner, a sealing gasket 3 is fixed at the joint of the plunger body 2 and the top wall of the pump box 1 in a gluing manner, a limiting ring 4 is fixed on the inner wall of the pump box 1 in a welding manner, a sealing ring 5 is propped against the top wall of the limiting ring 4, the inner aperture of the sealing ring 5 is matched with the size of the plunger body 2 and is connected with the plunger body 2 in a sealing and sliding manner, a plurality of sliding blocks 6 are fixed on the circumference of the inner wall of the pump box 1 in a welding manner at equal intervals, when a pump body works, the plunger body 2 is pulled upwards, the volume in the pump box 1 is reduced, the air pressure is increased, so that the sealing ring 5 is pushed upwards to extrude the sealing gasket 3, the sealing gasket 3 is elongated under the action of self elasticity to block up a gap connected between the plunger body 2 and the pump box 1, avoid mud to get into the life who damages the pump body, a plurality of first sliding tray 7 have been seted up to the outer wall circumference of sealing ring 5 equidistant, a plurality of sliding blocks 6 and a plurality of first sliding tray 7 one-to-one and respectively with its corresponding first sliding tray 7 sliding connection for the removal that sealing ring 5 can be stable is provided with buffer on the sealing ring 5.

Buffer is including a plurality of

cavities

8, and 8 circumferences of a plurality of cavities are equidistant to be seted up at the diapire of sealing ring 5, and second sliding tray 9 has been seted up to the equal symmetry of diapire of cavity 8, and equal sliding connection has snubber block 10 in the second sliding tray 9, and the lateral wall symmetry welded fastening of cavity 8 has two first springs 11, and the other end of two first springs 11 is rather than the lateral wall welded fastening of corresponding snubber block 10.

The diapire of two snubber blocks 10 all rotates and is connected with dwang 12, the other end of dwang 12 rotates jointly and is connected with sliding seat 13, sliding seat 13 run through the diapire of cavity 8 and with the diapire sliding connection of cavity 8, the diapire welded fastening of sliding seat 13 has telescopic link 14, the free end welded fastening of telescopic link 14 has and touches piece 16, the cover is equipped with second spring 15 on the telescopic link 14, when 2 upward movement's of plunger body range is great, the bottom of plunger body 2 can touch at first and touch piece 16, and will come from the impact force in 2 bottoms of plunger body under the combined action of first spring 11 and second spring 15 and weaken, thereby avoid the impact force damage sealing ring 5 in 2 bottoms of plunger body, avoid causing the harm to the device.

One end of the second spring 15 is welded and fixed with the bottom wall of the sliding seat 13, the other end of the second spring is welded and fixed with the contact block 16, the sealing pad 3 is made of elastic materials, the contact block 16 is made of rubber materials, the top wall of the sealing ring 5 is abutted to the bottom wall of the sealing pad 3, and the number of the contact blocks 16 is not less than six.

In the utility model, when the pump body works, the plunger body 2 is upwards drawn at the moment, the volume in the pump box 1 is reduced when the plunger body 2 is upwards drawn, so that the air pressure of the part below the sealing ring 5 in the pump box 1 is increased, the sealing ring 5 is pushed to upwards move to extrude the sealing gasket 3, the sealing gasket 3 is changed in the extruding process, so that a gap between the plunger body 2 and the pump box 1 is sealed, the sealing performance of the pump body is ensured, when the upward movement amplitude of the plunger body 2 is large, the bottom of the plunger body 2 firstly touches the touch block 16 and extrudes the second spring 15 through the touch block 16, when the second spring 15 is extruded to the limit position, the sliding seat 13 upwards moves a little, and when the sliding seat 13 upwards moves, the two rotating rods 12 are respectively driven to rotate in opposite directions, thereby drive two snubber blocks 10 and extrude the impact force that makes 2 bottoms of plunger body bring and obtain further buffering to the first spring 11 to the impact force of avoiding 2 bottoms of plunger body causes the damage to sealing ring 5, makes the life increase of device.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a sealing device of high pressure slush pump plunger, includes pump box (1), its characterized in that, the roof of pump box (1) runs through sliding connection and has plunger body (2), the junction veneer with pump box (1) roof of plunger body (2) is fixed with sealed pad (3), the inner wall welded fastening of pump box (1) has spacing ring (4), the roof of spacing ring (4) offsets there is sealing ring (5), the inner aperture of sealing ring (5) cooperatees with the size of plunger body (2), and with plunger body (2) sealed sliding connection, the inner wall circumference equidistant welded fastening of pump box (1) has a plurality of sliding blocks (6), a plurality of first sliding tray (7) have been seted up to the outer wall circumference equidistant of sealing ring (5), and is a plurality of sliding block (6) and a plurality of first sliding tray (7) one-to-one and respectively rather than corresponding first sliding tray (7) sliding connection And a buffer device is arranged on the sealing ring (5).

2. The sealing device for the plunger of the high-pressure mud pump as claimed in claim 1, wherein the buffering device comprises a plurality of cavities (8), the plurality of cavities (8) are circumferentially and equidistantly arranged on the bottom wall of the sealing ring (5), the bottom walls of the cavities (8) are symmetrically provided with second sliding grooves (9), the second sliding grooves (9) are respectively and slidably connected with a damping block (10), the side walls of the cavities (8) are symmetrically welded and fixed with two first springs (11), and the other ends of the two first springs (11) are welded and fixed with the corresponding side walls of the damping blocks (10).

3. The sealing device for the plunger of the high-pressure mud pump as claimed in claim 2, wherein the bottom walls of the two damping blocks (10) are rotatably connected with a rotating rod (12), the other ends of the rotating rod (12) are rotatably connected with a sliding seat (13) together, the sliding seat (13) penetrates through the bottom wall of the cavity (8) and is slidably connected with the bottom wall of the cavity (8), a telescopic rod (14) is fixedly welded on the bottom wall of the sliding seat (13), a touch block (16) is fixedly welded on the free end of the telescopic rod (14), and a second spring (15) is sleeved on the telescopic rod (14).

4. A sealing arrangement for a plunger of a high pressure mud pump according to claim 3, characterized in that one end of the second spring (15) is welded to the bottom wall of the sliding seat (13) and the other end is welded to the contact block (16).

5. The sealing device for the plunger of a high-pressure mud pump according to claim 4, characterized in that the sealing gasket (3) is made of an elastic material and the contact block (16) is made of a rubber material.

6. A sealing arrangement for a high pressure slurry pump plunger according to claim 5, characterised in that the top wall of the sealing ring (5) abuts the bottom wall of the sealing gasket (3), and the number of contact blocks (16) is not less than six.