CN101225805A

CN101225805A - Non-leakage reversed flow type plunger pump

Info

Publication number: CN101225805A
Application number: CNA2008100103591A
Authority: CN
Inventors: 李广松
Original assignee: DALIAN LAUREL LIQUID EQUIPMENT Co Ltd
Current assignee: DALIAN LAUREL LIQUID EQUIPMENT Co Ltd
Priority date: 2008-02-01
Filing date: 2008-02-01
Publication date: 2008-07-23

Abstract

The invention relates to a leakage-free reflow piston pump as a reciprocating pump used in liquid transportation, in particular to a leakage-free reflow device used in the piston pump. The structure is that: a plurality of spacing rings are arranged between inner side packing of the piston pump and the outside packing; a groove is arranged on internal surface and external surface of the spacing ring; a plurality of round through holes are evenly distributed on the bottom of the groove; a plurality of pipe joints are arranged at both ends of a reflow pipe and are respectively connected with a pump body and an inlet pipe of the pump corresponding to the installation position of the spacing ring; leaking mediator from the inner side of the piston pump is transported to the inlet pipe of the pump by a close loop composed of a spacing ring and the reflow pipe. The leakage-free reflow piston pump as a reciprocating pump used in liquid transportation has an advantage that the mediator in the reflow pipe is inhaled into the working cavity of the piston pump when the piston pump is working, so the problem of mediator leakage outside the pump due to wear of the seal packing is effectively prevented.

Description

Non-leakage reversed flow type plunger pump

Technical field

The present invention relates to a kind of reciprocating pump that liquid is carried that is applied to, particularly relate to a kind of non-leakage reversed flow mechanism that is applied to the plunger type reciprocating pump.

Background technique

At present, the plunger type reciprocating pump of middle widespread usage all belongs to common plunger pump at the scene, because the filler that existing plunger pump is loaded is after piston is drawn to certain hour, filler wearing and tearing and the slit occurs and medium is leaked are so common plunger type reciprocating pump application area is very limited.In order to overcome existing problem, it is very necessary developing a kind of novel non-leakage reversed flow type plunger pump.

Summary of the invention

The objective of the invention is to overcome the back defective of leaking medium easily of filler wearing and tearing that above-mentioned common plunger type reciprocating pump is used to seal, a kind of backflow mechanism that can effectively prevent leaking medium is provided.Characteristics such as the present invention has that medium does not leak, long working life, use are reliable, pressure stability.

A kind of non-leakage reversed flow type plunger pump of the present invention is made up of inlet check valve, inboard filler, outside filler, Gland, plunger, the pump housing, active chamber, outlet non-return valve and pump discharge; Its structure is in the middle of inboard filler and the outside filler spacer ring to be housed, and plunger can slide in the spacer ring endoporus; Have groove part between the internal surface of spacer ring and the outer surface and be spacer ring outer surface groove and spacer ring inner surface recesses and have one group of open-work along the periphery of annular groove section; Having a return port with groove corresponding section in two sides outside the spacer ring on the pump housing is connected with the groove part of spacer ring; Termination portion at return port position sealed attachment reflow pipe, the other end head of reflow pipe is with the open-work phase sealed attachment of pump inlet side end, the medium transport that the loop of being made up of spacer ring and reflow pipe is leaked the inboard filler of plunger pump flows back in the plunger pump active chamber to pump inlet place.

The outer surface groove on the spacer ring of the present invention and the open-work that the bottom surface had of inner surface recesses are spacer ring groove overflow hole, and quantity 5-16 evenly distributes.

Reflow pipe of the present invention can adopt metal tube, hard plastic tube or other material flexible pipe.

The present invention has following characteristics and beneficial effect

1, owing to spacer ring is housed in the middle of the filler of medial and lateral, and have open-work on the inside and outside surface groove of spacer ring, the leaking medium that the filler wearing and tearing are produced returns in the pump housing by open-work and backflow mechanism, thereby saves medium, reduce production costs.

2, the present invention can make the time lengthening in working life of pump, and guarantees that the working pressure of pump is stable, can not produce the drain charge that causes owing to dielectric leakage and the reduction of pump work pressure.

3, thereby the present invention can be widely replaces old-fashioned plunger pump and has huge economy and imitate positive social benefit in industrial field.

Description of drawings

The present invention has three accompanying drawings, wherein:

Accompanying drawing 1 is the initial bit structural representation that non-leakage reversed flow type plunger pump sucks medium.

Accompanying drawing 2 is initial bit structural representations that non-leakage reversed flow type plunger pump is discharged medium.

Accompanying drawing 3 is structural representations of spacer ring in the non-leakage reversed flow type plunger pump.

Among the figure: 1, pump inlet, 2, inlet check valve, 3, reflow pipe, 4, inboard filler, 5, spacer ring, 6, outside filler, 7, Gland, 8, plunger, 9, the pump housing, 10, active chamber, 11, outlet non-return valve, 12, pump discharge, 13, spacer ring endoporus, 14, spacer ring outer surface groove, 15, spacer ring groove overflow hole, 16, the spacer ring inner surface recesses.

Embodiment

Below in conjunction with accompanying

drawing

1,2,3 couples of the present invention do further narration.

Plunger pump is made up of pump inlet 1, inlet check valve 2, inboard filler 4, outside filler 6, Gland 7, plunger 8, the pump housing 9, active chamber 10, outlet non-return valve 11 and pump discharge 12.

Plunger pump non-leakage reversed flow mechanism is made up of reflow pipe 3 and spacer ring 5.

It is spacer ring outer surface groove 14 and spacer ring inner surface recesses 16 that the outer surface of spacer ring 5 and internal surface all have groove, is evenly distributed 8 open-works, i.e. spacer ring groove overflow hole 15 at bottom portion of groove.Spacer ring 5 is contained between the inboard filler 4 and outside filler 6 of plunges pump body 9; The two ends of reflow pipe 3 have that pipe joint is connected on the pairing pump housing 9 in spacer ring 5 mounting points and the pipeline of pump inlet 1 on; The medium transport that the loop of being made up of spacer ring 5 and reflow pipe 3 can be leaked the inboard filler 4 of plunger pump is to the pipe of pump inlet 1.

With reference to Fig. 1, its plunger 8 to-and-fro motion in active chamber 10 during plunger pump work constantly changes the volume of active chamber 10.When plunger 8 moves from inside to outside from active chamber 10, the volume of active chamber 10 changes from small to big, pressure in the active chamber 10 reduces, this moment, inlet check valve 2 was opened, outlet non-return valve 11 is still closed, the medium that links in the pipeline with pump inlet 1 is inhaled in the active chamber 10, and this working procedure is called sucting stage.

With reference to Fig. 2, when plunger 8 moves from active chamber 10 ecto-entads, the volume of active chamber 10 from large to small, pressure in the active chamber 10 raises, this moment, outlet non-return valve 11 was opened, inlet check valve 2 is closed, the media in the active chamber 10 drained into pump discharge 12 joining pipelines in, this working procedure is called the discharge stage.

In plunger pump when work, is because some medium is understood in the wearing and tearing of filler leaks through inboard filler 4, by the groove 14 of the inner surface recesses 16 of spacer ring 5 and outer surface and will flow into 8 media in the open-work and pool together, be delivered in pump inlet 1 pipe by reflow pipe 3, sucting stage in plunger pump work is sucked into the medium in the reflow pipe 3 in the plunger pump active chamber 10 simultaneously again, and then prevents that effectively dielectric leakage is to pump.

Claims

1. a non-leakage reversed flow type plunger pump is made up of inlet check valve (2), inboard filler (4), outside filler (6), Gland (7), plunger (8), the pump housing (9), active chamber (10), outlet non-return valve (11) and pump discharge (12); It is characterized in that in the middle of inboard filler (4) and outside filler (8) spacer ring (5) being housed, plunger (8) can slide in spacer ring endoporus (13); Having groove part between the internal surface of spacer ring (5) and the outer surface is that spacer ring outer surface groove (14) and spacer ring inner surface recesses (16) have one group of open-work along annular groove section (14,16); Going up the outer surface groove portion (14) that has a same spacer ring of a return port (5) with spacer ring outer surface groove (14) corresponding section at the pump housing (9) is connected; Termination portion at return port position sealed attachment reflow pipe (3), the open-work phase sealed attachment of the same pump inlet of the other end head (1) side end of reflow pipe (3), by the loop that spacer ring (5) and reflow pipe (3) are formed medium transport to the pump inlet (1) that the inboard filler of plunger pump (4) is leaked is located, flowed back in the plunger pump active chamber (10).

2. non-leakage reversed flow type plunger pump according to claim 1; It is characterized in that the outer surface groove (14) on the spacer ring (5) and the open-work that the bottom surface had of inner surface recesses (16) are spacer ring groove overflow hole (15), quantity 5-16 evenly distributes.

3. non-leakage reversed flow type plunger pump according to claim 1; It is characterized in that reflow pipe (3) can adopt metal tube, hard plastic tube or other material flexible pipe.