阅读说明：本技术 一种用于柱塞泵的快换密封装置以及柱塞泵 (Quick-change sealing device for plunger pump and plunger pump ) 是由 谭国政 王超 唐春玲 王建成 李志亮 李勇超 张碧莹 冯菲娜 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种用于柱塞泵的快换密封装置以及柱塞泵,包括安装于柱塞上的密封套,所述密封套上套装有密封法兰,所述密封套的前端安装有压紧装置,所述密封套通过压紧装置与密封法兰固定,所述密封法兰固定安装于机架孔内,且末端与液压缸相接触。通过通过泵头、密封法兰与机架定位型式的改进,为快换柱塞密封系统留足了布置空间,使得整个柱塞、密封总成从能够从泵头取出,而不必对液力端进行任何拆卸,达到快速更换、可靠锁紧、节省更换时间的目的,大大提高注浆效率,降低运行成本。(The invention discloses a quick-change sealing device for a plunger pump and the plunger pump, which comprise a sealing sleeve arranged on a plunger, wherein a sealing flange is sleeved on the sealing sleeve, a pressing device is arranged at the front end of the sealing sleeve, the sealing sleeve is fixed with the sealing flange through the pressing device, the sealing flange is fixedly arranged in a rack hole, and the tail end of the sealing flange is contacted with a hydraulic cylinder. Through the improvement through pump head, sealing flange and frame location pattern, reserve for quick change plunger sealing system and have arranged the space sufficiently for whole plunger, sealed assembly are from can follow the pump head and take out, and need not carrying out any dismantlement to the hydraulic end, reach quick replacement, reliable locking, save the purpose of change time, improve slip casting efficiency greatly, reduce running cost.)

1. The quick-change sealing device for the plunger pump is characterized by comprising a sealing sleeve (8) installed on a plunger (12), wherein a sealing flange (7) is sleeved on the sealing sleeve (8), a pressing device is installed at the front end of the sealing sleeve (8), the sealing sleeve (8) is fixed with the sealing flange (7) through the pressing device, the sealing flange (7) is fixedly installed in a rack hole, and the tail end of the sealing flange is in contact with a hydraulic cylinder (20).

2. The quick-change sealing device for the plunger pump is characterized in that the compressing device comprises a compression nut (1) installed at the front end of a sealing sleeve (8), a clamping plate (2) is arranged outside the compression nut (1), and the clamping plate (2) is fixedly installed on the outer wall of a sealing flange (7) to prevent the compression nut (1) from loosening.

3. The quick-change sealing device for a plunger pump according to claim 1, characterized in that the sealing flange (7) is mounted on a frame (19) by means of sealing flange screws (18).

4. The quick-change sealing device for a plunger pump according to claim 1 or 3, characterized in that the sealing flange (7) is terminated with a first O-ring (10) and an O-ring (11).

5. The quick-change sealing device for the plunger pump according to claim 1, characterized in that a packing (9) is installed in the sealing sleeve (8).

6. The quick-change sealing device for the plunger pump according to claim 1 or 2, characterized in that a dustproof sealing ring (4) and a sealing ring (5) are installed in the sealing sleeve (8).

7. The quick-change sealing device for a plunger pump according to claim 1 or 2, characterized in that a second O-ring (6) is mounted between the sealing sleeve (8) and the sealing flange (7).

8. The plunger pump is characterized by comprising a plunger (12), wherein the plunger (12) is sleeved with the quick-change sealing device for the plunger pump as claimed in any one of claims 1 to 7, the front end of the plunger (12) is connected with a tappet (13) through a clamping sleeve component (14), the rear end of the plunger (12) is installed in a hydraulic cylinder (20), and a suction cover (17) and a pressing cover (15) are installed on the hydraulic cylinder (20).

9. Plunger pump according to claim 8, characterised in that the hydraulic cylinder (13) is mounted on a frame (19).

Technical Field

The invention relates to the technical field of plunger type reciprocating pump equipment, in particular to a quick-change sealing device for a plunger pump and the plunger pump.

Background

At present, the traditional grouting pump widely uses a pump type structure provided with a plunger in the design of a hydraulic end. Sealed traditional V type sealing washer that adopts leads to the sealed frequent damage of slip casting scene and sealed the appearance leakage or the plunger wearing and tearing condition appear must be dismantled the pump head and change, and it wastes time and energy to dismantle plunger and sealed assembly, and the running cost is high, in addition, when dismantling, must shut down, the waste time, reduces work efficiency.

Disclosure of Invention

In view of the above defects, the present invention provides a quick-change sealing device for a plunger pump and a plunger pump, which can prolong the service life of the plunger and the sealing assembly, and can reduce the downtime, improve the grouting efficiency, reduce the labor intensity, and reduce the operation cost without disassembling the pump head.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

the quick-change sealing device for the plunger pump comprises a sealing sleeve arranged on a plunger, wherein a sealing flange is sleeved on the sealing sleeve, a pressing device is arranged at the front end of the sealing sleeve, the sealing sleeve is fixed with the sealing flange through the pressing device, the sealing flange is fixedly arranged in a rack hole, and the tail end of the sealing flange is in contact with a hydraulic cylinder.

Closing device is including installing in the gland nut of seal cover front end, gland nut is provided with the cardboard outward, cardboard fixed mounting prevents that gland nut from relaxing in the sealing flange outer wall.

The sealing flange is installed on the frame through a sealing flange screw.

And the tail end of the sealing flange is provided with a first O-shaped ring and an O-shaped ring.

And a packing is arranged in the sealing sleeve.

And a dustproof sealing ring and a sealing ring are arranged in the sealing sleeve.

And a second O-shaped ring is arranged between the sealing sleeve and the sealing flange.

A plunger pump comprises a plunger, the plunger is sleeved with the quick-change sealing device for the plunger pump, the front end of the plunger is connected with a tappet through a clamping sleeve assembly, the rear end of the plunger is installed in a hydraulic cylinder, and a suction cover and a pressing cover are installed on the hydraulic cylinder.

The hydraulic cylinder is arranged on the frame.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a quick-change sealing device for a plunger pump and the plunger pump, wherein a hydraulic cylinder is directly arranged on a frame through the improvement of a pump head, a sealing flange and a frame positioning type, so that an arrangement space is reserved for a quick-change plunger sealing system, the sealing device can be directly and fixedly arranged on the frame, the whole plunger and sealing assembly can be taken out from the pump head without any disassembly of a hydraulic end, the purposes of quick change, reliable locking and replacement time saving are achieved, the grouting efficiency is greatly improved, and the operation cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a quick-change sealing device for a plunger pump of the device of the invention;

FIG. 2 is a schematic view of the plunger pump of the present invention;

FIG. 3 is a state diagram of the plunger of the present invention in an alternate position;

figure 4 is a diagram of the seal cartridge replacement state of the present invention.

In the drawings, 1 — a compression nut; 2, clamping the board; 3-screws; 4, a dustproof sealing ring; 5, sealing rings; 6-O-shaped ring; 7, sealing a flange; 8, sealing a sleeve; 9-packing; 10-O-ring; 11-O-ring; 12-a plunger; 13-a tappet; 14-a ferrule assembly; 15-pressing cover; 16-a gland stud; 17-suction cap; 18-sealing flange screws; 19-a frame; and 20, a hydraulic cylinder.

Detailed Description

The present invention will now be described in detail with reference to the drawings, wherein the described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.

The quick-change sealing device of the existing plunger pump is arranged between a rack and a hydraulic cylinder, and the obtained sealing device is connected with the rack and the hydraulic cylinder, so that when the sealing device needs to be changed, a clamping sleeve needs to be disassembled, a compression nut is unscrewed, a gland is disassembled, and a plug cover and a valve assembly are sequentially pulled out by using special tools. The method comprises the steps of disassembling a suction cover bolt, sequentially pulling out a gland and a suction cover, pulling out a plunger from a hole for installing a cylinder cover by using a special tool, then disassembling a hydraulic cylinder body bolt, disassembling a hydraulic cylinder body on the cylinder cover, and then replacing a stuffing box, a stuffing box end face seal and a filler, so that the whole replacement process is very complicated, and in order to solve the problem, the invention provides a quick-change sealing device for a plunger pump;

as shown in fig. 1-2, the hydraulic cylinder sealing device comprises a sealing sleeve 8 mounted on a plunger 12, wherein a sealing flange 7 is sleeved on the sealing sleeve 8, a pressing device is mounted at the front end of the sealing sleeve 8, the sealing sleeve 8 is fixed with the sealing flange 7 through the pressing device, the sealing flange 7 is fixedly mounted in a frame hole, and the tail end of the sealing flange is in contact with a hydraulic cylinder 20.

The hydraulic cylinder is directly positioned on the frame, the whole plunger sealing assembly is positioned in the frame hole by a sealing flange and is fixed on the frame by four screws on the end surface. When the plunger piston is disassembled, the plunger piston and the sealing assembly can be taken out from the inner hole of the pump head respectively only by disassembling the four screws and the suction cover on the end surface of the pump head, and other parts of the hydraulic end do not need to be disassembled.

Specifically, the compression device comprises a compression nut 1 arranged at the front end of a sealing sleeve 8, a clamping plate 2 is arranged outside the compression nut 1, the clamping plate 2 is fixedly arranged on the outer wall of a sealing flange 7, the compression nut 1 can be tightly pressed by the clamping plate 2, the compression nut 1 is prevented from loosening, and the sealing performance of the whole device is guaranteed.

In addition, in order to mount the whole quick-change sealing device on the plunger 12, the sealing flange 7 is fixedly mounted on the frame 19 through the frame hole by the sealing flange screw 18, so that the whole device is prevented from falling off, and the quick-change sealing device can be directly dismounted from the front end of the frame 19 without dismounting the hydraulic pump 20 due to the detachable independence of the sealing sleeve 8 and the sealing flange 7.

High sealing performance is required for the whole device, so that a first O-shaped ring 10 and an O-shaped ring 11 are arranged at the tail end of the sealing flange 7; a packing 9 is arranged in the sealing sleeve 8, so that the sealing sleeve can better adapt to media such as cement paste and the like, and a better sealing effect is achieved, and a dustproof sealing ring 4 and a sealing ring 5 are arranged in the sealing sleeve 8; and a second O-shaped ring 6 is arranged between the sealing sleeve 8 and the sealing flange 7. The sealing performance between the quick-change sealing device and the plunger 12 can be ensured to be more reliable by the aid of the sealing rings.

As shown in fig. 2, the present invention further provides a plunger pump, which includes a plunger 12, wherein a quick-change sealing device for the plunger pump is sleeved on the plunger 12, the quick-change sealing device for the plunger pump is the above-mentioned quick-change sealing device, in addition, the front end of the plunger 12 is connected with a tappet 13 through a ferrule assembly 14, the rear end of the plunger 12 is installed in a hydraulic cylinder 20, and a suction cover 17 and a pressing cover 15 are installed on the hydraulic cylinder 20. The hydraulic cylinder 13 is mounted on a frame 19.

The working principle of the invention is as follows:

the mode that the pump head is directly positioned on the rack is adopted, and space is reserved for a quick-change plunger sealing system. The pump head for the whole plunger sealing assembly is reliably positioned in the rack, so that the mounting precision of repeated installation of the plunger and the sealing assembly is ensured. The UN sealing effect is better, and the replacement is more convenient

The specific working process is as follows:

as shown in fig. 3, when the plunger needs to be replaced:

firstly, the cutting sleeve component 14 is disassembled, the disassembling screw 3 is taken down, the clamping plate 2 is disassembled, the gland nut 4 is unscrewed, the gland bolt 12 is disassembled, the gland 15 is disassembled, and the suction cover 17 is taken out to eject the plunger 12 by using a special tool.

As shown in fig. 4, the quick-change sealing device is replaced:

firstly, the plunger 12 is disassembled according to the steps, the gland bolt 12 is disassembled, the gland 12 and the suction cover 13 are disassembled, and then the gland 7 is ejected out by a special tool to replace the gland 8.

It will be appreciated by those skilled in the art that the above embodiments are merely preferred embodiments of the invention, and thus, modifications and variations may be made in the invention by those skilled in the art, which will embody the principles of the invention and achieve the objects and objectives of the invention while remaining within the scope of the invention.