CN201953643U

CN201953643U - Sealing leakage-prevention structure of reciprocating plunger pump

Info

Publication number: CN201953643U
Application number: CN2011200203489U
Authority: CN
Inventors: 黄亦仁
Original assignee: PHYSICAL AGROFORESTRY MACHINERY SCIENCE AND TECHNOLOGY(SUZHOU) CO Ltd
Current assignee: PHYSICAL AGROFORESTRY MACHINERY SCIENCE AND TECHNOLOGY(SUZHOU) CO Ltd
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2011-08-31
Anticipated expiration: 2021-01-21

Abstract

The utility model discloses a sealing leakage-prevention structure of a reciprocating plunger pump. The sealing leakage-prevention structure comprises a body mounted at the front end of a plunger hole passage, and is characterized in that the body adopts a frame ring shape, a V-groove is arranged at the middle on the end surface of the body on the side of the extending-out end of the plunger, a concave-ring groove is arranged at the middle section on the inner edge of the body, and a rigid positioning ring is arranged in the concave-ring groove. As the V-groove is arranged on the end surface of the body on the side of the extending-out end of the plunger, the end surface is jointly sealed in virtue of the self elasticity; and the concave-ring groove is arranged at the middle of the inner ring of the body to accommodate the rigid positioning ring used for facilitating positioning, therefore, the whole deformation-resistant performance is improved, the assembly is simplified, the independent replacement is facilitated, and the use cost is reduced.

Description

The sealed against leakage structure of reciprocating plunger pump

Technical field

The utility model relates to a kind of sealed against leakage part, is specifically related to a kind of sealed against leakage structure of reciprocating plunger pump.

Background technique

Be provided with reciprocating stopper rod in the reciprocating plunger pump, be the leakage that prevents that to-and-fro motion from causing, common end at stopper rod linear actuator hole face, side near intake chamber, according to the needs of actual leakproof, the permutation and combination of the sealed against leakage part of multiple layer is set, to reach the maintenance of multilayer leakproof.

Traditional leakage proof structure constitutes with the superimposed assembling of the leakage barriers with soft flexible annular or V-shaped part shape usually, reaches the leakproof purpose of lamination.Yet; when stopper rod is back and forth operated; tend to produce the extruding force of returning of high temperature and high pressure; add under the reciprocal high-speed motion; with the flexible sealing ring of traditional soft; the phenomenon that regular meeting produces sclerosis and is stressed distortion because of high pressure occurs, and to cause leak proof seal in use for some time, just can produce the situation of leakage.

In addition; when assembling because of soft elasticity leakproof ring again; there is the inconvenience in the location assembling in regular meeting, especially desires to do when changeing maintenance not only dismounting inconvenience in that situation takes place to leak; more because the ring behind the compressive deformation; the replacing operation that single old ring is not easy to do independent when actual changing the outfit, generally all need be put in order group leakproof ring and all change; not only improve maintenance cost, the more serious safety and stability disappearance that causes in the actual use.

Therefore need existing sealed against leakage part be improved, to remedy above-mentioned deficiency.

Summary of the invention

The utility model purpose provides a kind of sealed against leakage structure of reciprocating plunger pump, and by the improvement to structure, sealing, deformation resistance are improved, and simplify the structure, and are easy to change, and have reduced and have safeguarded user cost.

For achieving the above object, the technical solution adopted in the utility model is: a kind of sealed against leakage structure of reciprocating plunger pump, comprise that one is installed on the body of stopper rod duct front end, described body is the frame annular, the body end face middle part of nearly described stopper rod external part one side is provided with v-depression, described body inner edge stage casing is provided with concave ring groove, is provided with the rigidity positioning ring in this concave ring groove.

In the technique scheme, described reciprocating plunger pump is made up of the pump housing and crankcase usually, crankcase is provided with the plunger hole that leads to the pump housing, being connected stopper rod on the crankshaft-link rod passes plunger hole and stretches in the pump housing reciprocating, spray after producing high-pressure water flow, between the stopper rod and the pump housing, be provided with the sealed against leakage structure.In the utility model, body is sheathed on the stopper rod, and it is positioned on the end face of stopper rod external part one side and offers v-depression, make end face form the V-ring sheet, suitably prevent the infiltration of back-pressure fluid, form preferable elasticity simultaneously and paste effect, reach ora terminalis applying sealing effect.On the inner edge surface of the stage casing of body, offer concave ring groove, make body be similar to the frame ring-type, the rigidity positioning ring is set in concave ring groove, this positioning ring can adopt hard wear-resistant material to make, in use, positioning ring is placed on the stopper rod, and lubriation material is set between the two, for the assembling of body provides assist location, and improve non-deformability.

In the technique scheme, the internal diameter of described positioning ring equates with the external diameter of described stopper rod.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1, the utility model comprises a frame ring-type leakage barriers body, body is positioned at middle part, stopper rod external part one side end face v-depression is set, prevent on the one hand the infiltration of back-pressure fluid, provide on the other hand preferably that elasticity is covered on the stopper rod, reach the applying sealing effect preferable end face; The middle section of body inner ring surface is provided with concave ring groove, hold for the positioning ring that is sheathed on the stopper rod, rigidity wear-resistant material with positioning ring is that body provides good non-deformability, and for the assembling of body provides assist location, the assembling that makes leakage barriers with change more convenient;

2, because the setting of positioning ring for body provides assist location on stopper rod, is conveniently installed, and can be realized changeing of single local leakage barriers body, reduce the working service cost.

Description of drawings

Fig. 1 is the utility model embodiment one a user mode reference drawing;

Fig. 2 is the structure sectional view under the utility model embodiment one the assembled state.

Wherein: 10, the pump housing; 11, stopper rod; 12, body; 13, v-depression; 14, concave ring groove; 15, positioning ring.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: shown in Fig. 1,2, a kind of sealed against leakage structure of reciprocating plunger pump, comprise that one is installed on the body 12 of stopper rod 11 duct front ends, described body 12 is the frame annular, the body 12 end faces middle part of nearly described stopper rod 11 external parts one side is provided with v-depression 13, described body 12 inner edge stage casings are provided with concave ring groove 14, are provided with rigidity positioning ring 15 in this concave ring groove 14, and the internal diameter of described positioning ring 15 equates with the external diameter of described stopper rod 11.

As shown in Figure 1, the reciprocal stopper rod 11 that plunges pump body 10 built-in superchargings are used, described body 12 are sheathed on root edge place in the most close pump housing 10.As shown in Figure 2,12 one-tenth one frame ring-types of body have suitable width, it is provided with v-depression 13 by the middle part, a side end face that stopper rod 11 stretches out, can suitably prevent the infiltration of back-pressure fluid, form preferable elasticity simultaneously and paste effect, reach the preferable applying sealing effect of ora terminalis face.The ring body inner edge stage casing of described body 12, a default concave ring groove 14, for stronger rigidity wear resistance positioning ring 15 provides the holding space that wears, described positioning ring 15 is sheathed on the stopper rod 11, its internal diameter equates with the external diameter of stopper rod 11, by between positioning ring 15 and the stopper rod 11 lubriation material being set, make the interior annular distance of positioning ring originate from the extension that right formation stopper rod 11 places peritreme, reach the effect of certain sealing; Moreover, setting by rigidity positioning ring 15, make the assembling location of body 12 more easy, especially when traditional leakproof ring of collocation stopper rod 11 leading portions assembling is used, the location that can further form the leakproof assembling is auxiliary, reduce the doubt of distortion, make the package assembly of the sealed against leakage of stopper rod 11, reach the effect that changes the convenient simple and leakproof seal of assembling.

In the present embodiment, body 12 built-in rigidity positioning rings 15 see through the assist location assembling of positioning ring 15, and it is simpler and easy that body 12 assemblings are arranged, and the v-depression for the leakproof leading edge provides more firm stressed support simultaneously, avoids being out of shape the formation of leakage.In addition, because whole body 12 is a separate piece, when the lamination assembled arrangement is assembled, change assembling when being more convenient for keeping in repair, effectively make the replacement or the assembling of whole leakage proof structure member more easy, and do not have the operation disappearance of distortion behind the pressurized or the too many disassembly and assembly inconvenience of assembly, make the assembling of the pump housing 10 leakproof group structures, reach the effect of assembling convenient and safe practicality.

Claims

1. the sealed against leakage structure of a reciprocating plunger pump, comprise that one is installed on the body of stopper rod duct front end, it is characterized in that: described body is the frame annular, the body end face middle part of nearly described stopper rod external part one side is provided with v-depression, described body inner edge stage casing is provided with concave ring groove, is provided with the rigidity positioning ring in this concave ring groove.

2. the sealed against leakage structure of reciprocating plunger pump according to claim 1, it is characterized in that: the internal diameter of described positioning ring equates with the external diameter of described stopper rod.