CN218971408U

CN218971408U - Sealing device for plunger pump

Info

Publication number: CN218971408U
Application number: CN202222682660.5U
Authority: CN
Inventors: 刘海东; 梁君章; 刘云; 杨昊; 巩新波; 王彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-05-05
Anticipated expiration: 2032-10-12

Abstract

The utility model discloses a sealing device for a plunger pump, and relates to the technical field of plunger pumps. The packing gland is arranged around the outer part of a plunger rod, the plunger rod penetrates through the packing gland and the packing base, the diameter of the packing gland is larger than that of the packing base, the packing gland is arranged above the packing base and is connected with the packing base through a second fastening bolt, a base step is arranged in the upper part of the packing base, and the base step extends to the inner part of the packing gland. The packing gland is characterized in that a groove is formed in the packing gland, a cover plate is arranged above the groove, the packing gland, the cover plate and the groove are connected through a first fastening bolt, and a through hole is formed in the bottom of the groove. According to the utility model, through the cooperation of the pressure sensor, the pressure display screen and the pressure compensator, the lubricating liquid can be pressurized, partial pressure is counteracted, the abrasion of packing materials and plunger rods is reduced, the service life of the packing materials is prolonged, and the working efficiency of the plunger pump is improved.

Description

Sealing device for plunger pump

Technical Field

The utility model belongs to the technical field of plunger pumps, and particularly relates to a sealing device for a plunger pump.

Background

The five-cylinder plunger pump mainly provides a power source for the comprehensive mechanized coal mining hydraulic support of the medium-thickness coal seam, and compared with the low-pressure plunger pump, the pressure requirement standard is higher, packing sealing is commonly adopted in plunger pump plunger sealing at present, and as the packing of the plunger pump adopts a compression sealing mode, the friction force is large, so that the load of the pump body is large, the current is increased, packing materials need to be frequently replaced, and the working efficiency of the pump body is reduced. The utility model provides a plunger pump sealing device of public number CN212656963U that China authorized can pour into lubricating oil through the through-hole and reduce the wearing and tearing of packing and plunger rod, extension part life and plunger pump packing sealed change cycle, reduce material loss, improve the operating efficiency of plunger pump, but this patent still has certain shortcoming, for pour into outside through-hole that lubricating oil offered in this patent is more, the leakproofness of plunger pump has been influenced, and because the packing bears all medium operating pressure in sealed plunger work one-way, also can lead to frictional resistance big, especially under the circumstances that the plunger pump carried high pressure medium, the energy waste is high, the failure rate is fast, change frequently, manual work, the material consumption is big, therefore we improve, a sealing device for plunger pump is proposed.

Disclosure of Invention

The utility model aims to provide a sealing device for a plunger pump, which solves the existing problems: at present, packing is commonly adopted for plunger pump plunger sealing, and because the packing of the plunger pump adopts a compression sealing mode, the friction force is large, the load of the pump body is large, the current is increased, packing materials are required to be frequently replaced, the working efficiency of the pump body is reduced, and the friction resistance is large because the packing bears all medium working pressure unidirectionally in the working process of the sealing plunger, especially under the condition that the plunger pump conveys high-pressure medium, the energy waste is high, the failure speed is high, the replacement is frequent, and the labor and material consumption is large.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a sealing device for a plunger pump, which comprises a plunger rod, wherein a packing gland and a packing base are arranged around the outer part of the plunger rod, the plunger rod penetrates through the packing gland and the packing base, the diameter of the packing gland is larger than that of the packing base, the packing gland is arranged above the packing base and is connected with the packing base through a second fastening bolt, a base step is arranged in the upper part of the packing base, and the base step extends to the inside of the packing gland. The packing gland is characterized in that a groove is formed in the packing gland, a cover plate is arranged above the groove, the packing gland, the cover plate and the groove are connected through a first fastening bolt, a through hole is formed in the bottom of the groove, the through hole penetrates through a base step, an input pipe is arranged on the left side of the packing gland, the input pipe extends to the inside of the groove, a valve and a pressure compensator are arranged on the input pipe, a pressure sensor is arranged on the right side of the packing gland, and a pressure display screen is arranged on the pressure sensor.

Further, the pressure compensator and the pressure sensor are electrically connected with the pressure display screen.

Further, packing materials are arranged in the packing base, and the packing materials are located below the base steps.

Further, the number of the through holes is eight, and the through holes are uniformly distributed in the groove in a circular array and extend to the bottom of the base step.

Further, the packing materials are uniformly arranged from bottom to top to fill the gap between the packing base and the plunger rod.

Further, the outer diameter of the groove and the diameter of the base step are the same as those of the packing base.

The utility model has the following beneficial effects:

1. according to the utility model, through the cooperation of the pressure sensor, the pressure display screen, the valve and the pressure compensator, when the plunger pump is in use, the pressure sensor can be used for measuring the internal pressure of the pump body and displaying the numerical value through the pressure display screen, when the numerical value on the pressure display screen reaches a preset value, the valve is opened, the pressure compensator starts to work, the lubricating liquid conveyed in the input pipe is regulated to proper pressure by the pressure compensator to boost the pressure, and the pressurized high-pressure compensating liquid is conveyed to the packing material, so that the pressure can be completely or partially counteracted, the abrasion of the packing material and the plunger rod is reduced, the service life of the packing material is prolonged, and the working efficiency of the plunger pump is improved.

2. According to the utility model, through the matched use of the input pipe, the groove and the through holes, when the lubricating liquid passes through the input pipe, if the pressure reaches a preset value, the pressure compensator works to boost the pressure of the lubricating liquid, and the boosted lubricating liquid enters the groove.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a top view of the internal structure of the present utility model;

FIG. 4 is a front view of the internal structure of the present utility model;

FIG. 5 is a system control block diagram of the pressure compensator of the present utility model;

in the drawings, the list of components represented by the various numbers is as follows:

1. a plunger rod; 2. a first fastening bolt; 3. packing gland; 4. a pressure display screen; 5. a pressure compensator; 6. a valve; 7. an input tube; 8. a packing base; 9. a packing material; 10. a groove; 11. a second fastening bolt; 12. a through hole; 13. a base step; 14. a pressure sensor; 15. and a cover plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the utility model discloses a sealing device for a plunger pump, which comprises a packing gland 3 and a packing base 8 arranged around the outer part of a plunger rod 1, wherein the plunger rod 1 penetrates through the packing gland 3 and the packing base 8, the diameter of the packing gland 3 is larger than that of the packing base 8, the packing gland 3 is arranged above the packing base 8, the packing gland 3 and the packing base 8 are connected through a second fastening bolt 11, a base step 13 is arranged inside the upper part of the packing base 8, and the base step 13 extends to the inside of the packing gland 3. The packing gland 3 is internally provided with a groove 10, a cover plate 15 is arranged above the groove 10, the packing gland 3, the cover plate 15 and the groove 10 are connected through a first fastening bolt 2, a through hole 12 is arranged at the bottom of the groove 10, and the through hole 12 penetrates through a base step 13. When the lubricating fluid passes through from the input pipe 7, if the pressure reaches a preset value, the pressure compensator 5 works to pressurize the lubricating fluid, the pressurized lubricating fluid enters the groove 10, and as eight through holes 12 are formed in the groove 10 and extend to the packing base 8, the lubricating fluid can be conveyed to the packing material 9 through the through holes 12 to lubricate the packing material 9, the comprehensiveness of the lubricating effect is guaranteed, the packing gland 3 is arranged outside the groove 10, the tightness of the plunger pump device cannot be influenced by the through holes 12 in the groove, and the liquid leakage caused by the operation of the plunger pump is reduced. The left side of packing gland 3 is provided with input tube 7, and input tube 7 extends to the inside of recess 10, is provided with valve 6 and pressure compensator 5 on the input tube 7. The right side of packing gland 3 is provided with pressure sensor 14, is provided with pressure display screen 4 on the pressure sensor 14. The pressure compensator 5 and the pressure sensor 14 are electrically connected with the pressure display screen 4, when the plunger pump is in use, the pressure sensor 14 can be used for measuring the internal pressure of the pump body and displaying the numerical value through the pressure display screen 4, when the numerical value on the pressure display screen 4 reaches a preset value, the valve 6 is opened, the pressure compensator 5 starts to work, the lubricating liquid conveyed in the input pipe 7 is regulated to be pressurized by the pressure compensator 5, the pressurized high-pressure compensating liquid is conveyed to the packing material 9, the pressure can be completely or partially counteracted, the abrasion of the packing material 9 and the plunger rod 1 is lightened, the service life of the packing material 9 is prolonged, and the working efficiency of the plunger pump is improved. The packing base 8 is internally provided with packing material 9, and the packing material 9 is located below the base step 13. Eight through holes 12 are uniformly distributed in the groove 10 in a circular array and extend to the bottom of the base step 13. The packing material 9 is uniformly arranged from bottom to top to fill the gap between the packing base 8 and the plunger rod 1. The outer diameter of the groove 10 and the diameter of the base step 13 are the same as the packing base 8.

One specific application of this embodiment is: when the plunger pump works, the pressure sensor 15 and the pressure display screen 4 are opened to monitor the pressure in the pump body, meanwhile, the valve 6 is opened, one end of the input pipe 7 starts to input lubricating liquid, the lubricating liquid enters the groove 10 and then enters packing materials through the through holes 12 in the groove 10, the packing materials are comprehensively lubricated, if the pressure display screen 4 monitors that the pressure value reaches a preset value, the pressure compensator 5 is started to work, the pressure compensator 5 increases proper pressure to the lubricating liquid in the input pipe 7 according to the pressure value in the pump body, so that partial pressure in the pump body can be offset, friction between the packing materials and the plunger rod 1 is reduced, the replacement times of the packing materials are reduced, and the working efficiency of the plunger pump is improved.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A sealing device for a plunger pump, comprising a plunger rod (1), characterized in that: the utility model discloses a pressure compensator, including plunger rod (1), packing gland (3) and packing base (8) are provided with around the outside of plunger rod (1), plunger rod (1) runs through packing gland (3) and packing base (8), the diameter of packing gland (3) is greater than packing base (8), packing gland (3) are in the top of packing base (8), and both are connected through second fastening bolt (11), and the top inside of packing base (8) is provided with base ladder (13), base ladder (13) extend to the inside of packing gland (3), the inside of packing gland (3) is provided with recess (10), recess (10) top is provided with apron (15), packing gland (3), apron (15) and recess (10) are connected through first fastening bolt (2), the bottom of recess (10) is provided with through-hole (12), the through-hole (12) runs through base ladder (13), the left side of packing gland (3) is provided with input tube (7), the inside of packing gland (3) is provided with recess (7), the inside of recess (7) is provided with recess (10) and pressure compensator (6) are provided with pressure compensator (6), the pressure sensor (14) is provided with a pressure display screen (4).

2. A sealing device for a plunger pump according to claim 1, wherein: the pressure compensator (5) and the pressure sensor (14) are electrically connected with the pressure display screen (4).

3. A sealing device for a plunger pump according to claim 1, wherein: the packing base (8) is internally provided with packing materials (9), and the packing materials (9) are positioned below the base steps (13).

4. A sealing device for a plunger pump according to claim 3, wherein: eight through holes (12) are uniformly distributed in the groove (10) in a circular array and extend to the bottom of the base step (13).

5. A sealing device for a plunger pump according to claim 3, wherein: the packing materials (9) are uniformly arranged from bottom to top and fill up gaps between the packing base (8) and the plunger rod (1).

6. A sealing device for a plunger pump according to claim 1, wherein: the outer diameter of the groove (10) and the diameter of the base step (13) are the same as those of the packing base (8).