CN114165434B

CN114165434B - Plunger pump for high-salt and high-corrosion medium and sealing structure thereof

Info

Publication number: CN114165434B
Application number: CN202111541234.3A
Authority: CN
Inventors: 王靖; 肖玉林
Original assignee: Zhejiang Danong Machinery Co ltd
Current assignee: Zhejiang Danong Machinery Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-11-01
Anticipated expiration: 2041-12-16
Also published as: CN114165434A

Abstract

A plunger pump sealing structure for high-salt and high-corrosion media belongs to the technical field of plunger pumps and comprises a crankshaft connecting rod assembly, wherein a partition plate is sleeved on a sliding end of the crankshaft connecting rod assembly; the partition plate part comprises a partition plate body, a through groove used for being matched with the crankshaft connecting rod assembly is arranged on the partition plate body in a penetrating mode, a functional hole used for filling lubricating oil is formed in the upper end face of the partition plate body, the functional hole is communicated with the through groove, a drainage channel is arranged on the lower side of the through groove, at least one end of the drainage channel penetrates through the partition plate body, a drainage branch pipe is arranged on the drainage channel in a communicating mode, and the drainage branch pipe is communicated with the through groove; according to the invention, the leaked medium is guided away by arranging the partition plate, so that the purpose of leakage controllability is realized, and the service life of the plunger pump in conveying high-salt and high-corrosion medium is prolonged; in addition, the invention also discloses a plunger pump applying the sealing structure.

Description

Plunger pump for high-salt and high-corrosion medium and sealing structure thereof

Technical Field

The invention belongs to the technical field of plunger pumps, and particularly relates to a plunger pump for a high-salt and high-corrosion medium and a sealing structure thereof.

Background

Plunger pumps are an important device in fluid pressurization systems. The volume of the sealed working cavity is changed by means of reciprocating motion of the plunger in the cylinder body, so that the pumping action of a conveying medium is realized, and the liquid conveying and pressurization are realized by matching with a flow distribution mechanism. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions where high pressure, large flow and flow need to be regulated, such as seawater desalination, landfill leachate treatment, high-pressure and ultrahigh-pressure cleaning equipment and other systems.

A high-pressure plunger pump for high salt high corrosion operating mode can appear sealed vice condition of leaking working medium because sealed life-span problem, when working medium is high salt or high corrosion operating mode, the medium of leaking can be attached to on each spare part inevitable, can destroy the sealed effect of cross head or reciprocal oil blanket after the crystal is appeared, the medium of leaking in addition also can cause the pollution to job site, damages other parts.

Disclosure of Invention

The present invention aims to provide a plunger pump for high-salt and high-corrosion medium and a sealing structure thereof, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a plunger pump sealing structure for high-salt and high-corrosion media comprises a crankshaft connecting rod assembly, wherein a partition plate is sleeved at the sliding end of the crankshaft connecting rod assembly; the partition plate piece comprises a partition plate body, a through groove matched with the crankshaft connecting rod assembly is formed in the partition plate body in a penetrating mode, functional holes used for filling lubricating oil are formed in the upper end face of the partition plate body, the functional holes are communicated with the through groove, a drainage channel is arranged on the lower side of the through groove, at least one end of the drainage channel penetrates through the partition plate body, a drainage branch pipe is arranged on the drainage channel in a communicating mode, and the drainage branch pipe is communicated with the through groove.

Compared with the prior art, the technical scheme has the following effects:

1) According to the traditional plunger pump sealing structure, after a sealing element in the traditional sealing structure is corroded after working for a long time and under the environment of high-salt and high-corrosion media, leaked media can directly leak outwards, and the purpose of leakage controllability is achieved by arranging the partition plate to guide away the leaked media.

2) The partition plate is simple in structure and reasonable in design, the service life of the plunger pump is prolonged under the combined action of the drainage channel, the through groove and the functional hole when high-salt and high-corrosion media are conveyed, and meanwhile the media can be effectively prevented from leaking.

Preferably, an assembly block for dividing the through groove into two areas is arranged in the through groove, and a communication hole for communicating the two areas is arranged on the assembly block in a penetrating manner.

Preferably, the crankshaft connecting rod assembly comprises a crankshaft, a plurality of piston connecting rod assemblies are hinged to the crankshaft at uniform intervals, a supporting ring sleeve, a cloth clamping main water seal piece and a spring are sequentially arranged on the piston connecting rod assemblies, one end of the spring is arranged on the cloth clamping main water seal piece, and the other end of the cloth clamping main water seal piece abuts against the supporting ring sleeve.

Preferably, the piston connecting rod assembly is further provided with an auxiliary water seal part, and the auxiliary water seal part and the cloth clamping main water seal part are respectively arranged on two sides of the partition plate body.

Preferably, the piston and connecting rod assembly comprises a piston connecting rod hinged to the crankshaft, the other end of the piston connecting rod is hinged to a connecting rod, an oil seal pressing sleeve is sleeved on a rod body of the connecting rod and sleeved with the auxiliary water seal piece, and the supporting ring sleeve, the cloth clamping main water seal piece and the spring are all sleeved on the connecting rod, wherein the supporting ring sleeve is in clearance fit with the auxiliary water seal piece, and the supporting ring sleeve and the auxiliary water seal piece are all inserted into the through groove.

Preferably, the end face, facing the supporting ring sleeve, of the auxiliary water sealing part is sleeved with a felt, the felt is contained in the through groove when the device works, and the oil outlet end of the functional hole is located right above the felt.

Preferably, a bolt hole is provided on a peripheral side of the through groove.

Preferably, the drainage channel is obliquely arranged inside the separator body, and the oblique lower end of the drainage channel penetrates through the separator body.

The invention also discloses a plunger pump for the high-salt and high-corrosion medium, which comprises a cylinder body and a crankcase, wherein the cylinder body and the crankcase are connected through bolts to form a mounting piece, and a sealing structure in any one of the above schemes is arranged in the mounting piece.

Drawings

FIG. 1 is a schematic view of the overall structure of the plunger pump of the present invention;

FIG. 2 is an exploded view of the plunger pump of the present invention;

FIG. 3 is a schematic view of a crankshaft connecting rod assembly of the present invention;

FIG. 4 is a schematic view of the construction of the partition member of the present invention;

fig. 5 is a schematic view of the crankcase structure of the invention.

In the figure: 1-end cap; 2-a drive shaft; 3-a partition member; 30-a separator body; 31-through slots; 32-a drainage channel; 33-a functional pore; 4-cylinder body; 5-pump head pressure plate; 6, a dust cover; 7-an oil filling pipe; 8-a breather plug assembly; 9-crankshaft connecting rod assembly; 90-oil sealing and pressing the sleeve; 91-supporting a ring sleeve; 92-clamping the main water seal piece; 93-a spring; 94-a connecting rod; 95-piston rod; 96-crankshaft; 10-a crankcase; 100-a movable cavity; 101-installing a channel; 102-a leakage channel; 11-secondary water seal; 12-felt; 13-assembling the block.

Detailed Description

The technical solutions in the embodiments of the present invention will be made clear and fully described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The embodiment is as follows:

the plunger pump for high-salt and high-corrosion media as shown in fig. 1 sequentially comprises a cylinder block 4, a partition plate 3 and a crankcase 10 according to the output direction of the operation of the plunger pump, wherein the crankcase 10 and the cylinder block 4 are connected with each other through the partition plate 3, and a crankshaft connecting rod assembly 9 is movably arranged in the crankcase 10; the driving end of the crankshaft connecting rod assembly 9 is in power connection with the driving shaft 2, in this embodiment, the cylinder block 4 is in bolt connection with a pump head pressing plate 5, the pump head pressing plate 5 is provided with a check valve, and the check valve is accommodated in the cylinder block 4, as can be seen in fig. 2.

It should be mentioned that, in order to drain away the leaked medium and achieve the purpose of controllable leakage, the partition plate member 3 includes a partition plate body 30, a through groove 31 for matching with the crankshaft connecting rod assembly 9 is provided on the partition plate body 30 in a penetrating manner, and a functional hole 33 for filling lubricating oil is provided on an upper end surface of the partition plate body 30, the functional hole 33 is communicated with the through groove 31, a drainage channel 32 is provided on a lower side of the through groove 31, at least one end of the drainage channel 32 penetrates through the partition plate body 30, in this embodiment, the drainage channel 32 is obliquely provided inside the partition plate body 30, and an oblique lower end (as can be seen from fig. 4, that is, one end of the drainage channel 32 close to a lower end surface of the partition plate body 30) penetrates through the partition plate body 30, and a drainage branch pipe is provided on the drainage channel 32, and the drainage branch pipe is communicated with the through groove 31; the lower end of the branch drainage pipe extends downwards to the lower end face of the partition board body 30, but in the actual working process, the lower end of the branch drainage pipe is sealed by adopting a plug or welding, and the purpose of penetrating through the lower end face of the partition board body 30 is to reduce the manufacturing difficulty.

In addition, the circumference of the through groove 31 is provided with bolt holes, which is convenient for the stability during installation, secondly, the through groove 31 is internally provided with an assembly block 13 which divides the through groove 31 into two areas, the assembly block 13 is provided with a communication hole for communicating the two areas in a penetrating way, so that the leaked medium can be blocked at the front end of the crankshaft connecting rod assembly 9 conveniently, and meanwhile, the upper end of the drainage branch pipe is positioned at one side of the assembly block 13 facing the cylinder 4.

Secondly, as can be seen from fig. 3, the crankshaft connecting rod assembly 9 includes a crankshaft 96, a plurality of piston connecting rod assemblies are hinged on the crankshaft 96 at uniform intervals, a supporting ring sleeve 91, a cloth clamping main water seal 92 and a spring 93 are sequentially arranged on the piston connecting rod assemblies, one end of the spring 93 is arranged on the cloth clamping main water seal 92, and the other end of the cloth clamping main water seal 92 abuts against the supporting ring sleeve 91; in this embodiment, the piston link assembly is further provided with an auxiliary water seal 11, the auxiliary water seal 11 and the cloth clamping main water seal 92 are respectively disposed on two sides of the partition body 30, for a conventional plunger pump, the cloth clamping main water seal 92 located at the front end fails under the action of high-salt and high-corrosion media, and in this case, the media leaks, which causes leakage of the media and leakage of the media to the power end of the crankshaft link assembly 9, causing damage to other parts.

In this embodiment, the piston link assembly includes a piston link rod 95 hinged to the crankshaft 96, the other end of the piston link rod 95 is hinged to a connecting rod 94, an oil seal pressing sleeve 90 is sleeved on a rod body of the connecting rod 94, the oil seal pressing sleeve 90 is sleeved with the auxiliary water seal 11, and the support ring sleeve 91, the cloth clamping main water seal 92 and the spring 93 are all sleeved on the connecting rod 94, wherein the support ring sleeve 91 is in clearance fit with the auxiliary water seal 11, and the support ring sleeve 91 and the auxiliary water seal 11 are all inserted into the through groove 31.

Meanwhile, the felt 12 is sleeved on the end surface of the auxiliary water seal 11 facing the support ring sleeve 91, when the device works, the felt 12 is accommodated in the through groove 31, the oil outlet end of the functional hole 33 is positioned right above the felt 12 and serves as a lubricating oil supplementing channel, in addition, the auxiliary water seal 11 can be lubricated, and the service life of the auxiliary water seal 11 is ensured.

In this embodiment, the rear end of the crankcase 10 is recessed inwards to form a movable cavity 100, an opening of the movable cavity 100 is fixed with an end cover 1 through a bolt, an oil filling pipe 7 is arranged on the end cover 1, the oil filling pipe 7 is communicated with the movable cavity 100, a ventilating oil plug assembly 8 is connected to the oil filling pipe 7 in a threaded manner, an installation passage 101 matched with the piston connecting rod assembly is arranged in the crankcase 10, the installation passage 101 is communicated with the movable cavity 100, a leakage passage 102 is vertically arranged at a position, close to the front end, of the crankcase 10, the leakage passage 102 penetrates through the crankcase 10 from top to bottom and is communicated with the installation passage 101, a dust cover 6 is inserted into the upper end of the leakage passage 102, dust in a working environment is prevented from falling into equipment, and the dust cover is prevented from falling into the equipment and damaged, and a leakage cover is inserted into the lower end of the leakage passage.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

The present invention has been described in terms of embodiments, and several variations and modifications can be made to the device without departing from the principles of the present invention. It should be noted that all the technical solutions obtained by means of equivalent substitution or equivalent transformation, etc., fall within the protection scope of the present invention.

Claims

1. A plunger pump sealing structure for high-salt and high-corrosion media comprises a crankshaft connecting rod assembly (9), wherein a partition plate (3) is sleeved at the sliding end of the crankshaft connecting rod assembly (9); the method is characterized in that: the partition plate piece (3) comprises a partition plate body (30), a through groove (31) matched with the crankshaft connecting rod assembly (9) is arranged on the partition plate body (30) in a penetrating mode, a functional hole (33) used for filling lubricating oil is formed in the upper end face of the partition plate body (30), the functional hole (33) is communicated with the through groove (31), a drainage channel (32) is arranged on the lower side of the through groove (31), at least one end of the drainage channel (32) penetrates through the partition plate body (30), a drainage branch pipe is arranged on the drainage channel (32) in a communicating mode, and the drainage branch pipe is communicated with the through groove (31); an assembly block (13) which divides the through groove (31) into two areas is arranged in the through groove (31), and a communication hole for communicating the two areas is arranged on the assembly block (13) in a penetrating manner; the cloth clamping device is characterized in that the crankshaft connecting rod assembly (9) comprises a crankshaft (96), a plurality of piston connecting rod assemblies are hinged to the crankshaft (96) at uniform intervals, a supporting ring sleeve (91), a cloth clamping main water seal piece (92) and a spring (93) are sequentially arranged on the piston connecting rod assemblies, one end of the spring (93) is arranged on the cloth clamping main water seal piece (92), and the other end of the cloth clamping main water seal piece (92) is abutted to the supporting ring sleeve (91).

2. The plunger pump sealing structure for high-salt and high-corrosion medium according to claim 1, wherein: an auxiliary water sealing part (11) is further arranged on the piston connecting rod assembly, and the auxiliary water sealing part (11) and the cloth clamping main water sealing part (92) are respectively arranged on two sides of the partition plate body (30).

3. A plunger pump sealing structure for high-salt and high-corrosion medium according to claim 2, characterized in that: piston link assembly including articulate in piston link (95) on bent axle (96), the other end of piston link (95) articulates there is connecting rod (94), the cover is equipped with oil blanket pressure cover (90) on the body of rod of connecting rod (94), oil blanket pressure cover (90) with vice water seal (11) cup joint, just support ring sleeve (91), press from both sides cloth owner water seal (92) and spring (93) and all overlap and locate on connecting rod (94), wherein, support ring sleeve (91) with vice water seal (11) clearance fit, just support ring sleeve (91) with vice water seal (11) all cartridge in pass through in groove (31).

4. A plunger pump sealing structure for high-salt and high-corrosion medium according to claim 3, characterized in that: the end face, facing the supporting ring sleeve (91), of the auxiliary water seal part (11) is sleeved with a felt (12), when the device works, the felt (12) is contained in the through groove (31), and the oil outlet end of the functional hole (33) is located right above the felt (12).

5. A plunger pump sealing structure for high-salt and high-corrosion medium according to any one of claims 1 to 4, characterized in that: bolt holes are formed in the peripheral side of the through groove (31).

6. The plunger pump sealing structure for high-salt and high-corrosion medium according to claim 5, wherein: the drainage channel (32) is obliquely arranged inside the clapboard body (30), and the oblique lower end of the drainage channel penetrates through the clapboard body (30).

7. A plunger pump for high-salt and high-corrosion media, which comprises a cylinder body (4) and a crankcase (10), wherein the cylinder body (4) and the crankcase (10) are connected through bolts to form a mounting part, and is characterized in that: a sealing structure according to any one of claims 1-6 is provided in the mounting.