CN2339815Y

CN2339815Y - Super-high-pressure plunger pump one-way valve

Info

Publication number: CN2339815Y
Application number: CN 97245724
Authority: CN
Inventors: 李肇伦; 钟国祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-10-07
Filing date: 1997-10-07
Publication date: 1999-09-22
Anticipated expiration: 2007-10-07

Abstract

The utility model provides an ultra-high pressure plunger pump one-way valve, and is characterized in that the utility model is composed of a pump body, a plunger sleeve, a plunger rod, a water inlet joint and a water outlet joint. The plunger sleeve and the plunger rod are arranged in a blind hole which is in the center of the pump body, an inner hole is provided with a valve core base, a valve core sleeve, a valve core, a compression spring and the water inlet joint of a spherical pad from inside to outside. The inner hole and the water outlet joint which has the equal structure but a reversing assembly sequence of internal parts are symmetrically arranged at the lower part of the pump body, and an outlet hole of the water inlet joint and an inlet hole of the water outlet joint are communicated with the bottom of the pump body blind hole. Compared with the prior art, the one-way valve has the advantages of good sealing, low cost, long working life, etc., and is suitable for the use of a high-pressure plunger pump.

Description

Ultrahigh pressure plunger pump one-way valve

The utility model belongs to the one-way valve that a kind of improved hydraulic system is used, particularly a kind of ultrahigh pressure plunger pump one-way valve.

Water jet cutting mach is to adopt the ultrahigh pressure water pump that water is pressurized to the high pressure of hundreds of MPas, is connected to nozzle particular design, that the aperture is very little by special pipeline then and penetrates, the process equipment that object is cut.In order to guarantee that water cutting machine can produce hyperpressure, the one-way valve in the high pressure water route must have reliable sealing.At present, water cutting machine all adopts the one-way valve of making spool, conical surface sealing means with steel ball both at home and abroad.The characteristics of this one-way valve are that structure is comparatively simple, but not enough be to material select and the requirement of machining accuracy all than higher, so cost height, and quality is not allowed assurance again.

The purpose of this utility model is to overcome the deficiency of prior art, provides a kind of sealing reliable, the ultrahigh pressure plunger pump one-way valve that quality guarantees easily and manufacture cost is lower.

Task of the present utility model realizes by this way: this one-way valve is by the pump housing, plunger bushing, plunger rod, water supply connector and water output connector are formed, plunger rod and plunger bushing are installed in the blind hole at pump housing center, water supply connector and water output connector are symmetricly set in pump housing end, from-inner-to-outer is equipped with the spool base in the endoporus of water supply connector, valve core housing, spool, pressure spring and ball ring, from-inner-to-outer is equipped with ball ring in the endoporus of water output connector, pressure spring, valve core housing, spool and spool base, spool base and ball ring have central through bore, on the cylndrical surface of spool, have some axial water-flowing troughs, spool is a plane contact with contacting of spool base, the spool base of the ball ring of water supply connector and water output connector is close to the pump housing, its central through bore is communicated with pump housing blind hole bottom, and the spool base central through bore of water supply connector and the central through bore of water output connector are communicated with the water inlet of water supply connector and the osculum of water output connector respectively.

One-way valve of the present utility model is work like this; During use, with the bent axle in plunger rod and the water jet cutting mach power system, connecting rod connects, and water supply connector is connected with outlet pipe with intake pipe respectively with water output connector.When bent axle, when connecting rod drives the plunger rod rollback, just produce vacuum in the pump housing blind hole, the resistance that the spool in the water supply connector is subjected to the pull of vacuum effect to overcome pressure spring moves up and leaves the spool base.At this moment the low-pressure water sent of low-pressure pump just enters in the blind hole of the pump housing through the central through bore of spool base, the water-flowing trough of spool and the central through bore of ball ring, meanwhile the spool of water output connector also is subjected under the pressure effect of interior pull of vacuum of blind hole and pressure spring, press the spool base, high pressure water can't be flow backwards; And when plunger rod advances, the spool of water supply connector be subjected to pump housing inner high voltage water the pressure effect, press the spool base, stop high pressure water to flow backwards, meanwhile, spool on the water output connector is subjected to the pressure effect of pump housing inner high voltage water, overcome the resistance of pressure spring and move up, high pressure in the pump housing is just through the central through bore of spool base, and the water-flowing trough of spool and ball ring central through bore flow out from water output connector.Two kinds of working staties of the present utility model have played the effect that the control high pressure water flows toward a direction.Because spool is plane contact with contacting of spool base, realized good seal action, not high to material requirements, quality of processing guarantees easily again, weares and teares less, and long service life has overcome the deficiency of existing one-way valve.

Below in conjunction with accompanying drawing structure of the present utility model is further described.

Fig. 1 is the sectional view of a kind of concrete structure of the utility model.

Fig. 2 is the left view of spool 11 among Fig. 1.

As shown in Figure 1, offer a blind hole 6 at the center of the pump housing 5, the plunger bushing 4 of packing within it, fix with screw thread, the plunger rod 1 of in plunger bushing 4, packing into, and with thread bush 2 and seal ring 3 fastening and sealings, between plunger bushing 4 and blind hole 6, the sealing assembly also is set, prevents to leak.Be symmetrical arranged water supply connector 7 and water output connector 8 in the pump housing 5 ends.From-inner-to-outer is loaded onto spool base 9, valve core housing 10, spool 11, pressure spring 12 and ball ring 13 in the endoporus of water supply connector 7.From-inner-to-outer is also packed into ball ring 13, pressure spring 12, spool 11, valve core housing 10 and the spool base 9 of spline structure in the endoporus of water output connector 8.Spool base 9 and ball ring 13 all have the water port, center, and 11 axial water-flowing troughs of 3-6 bar (as shown in Figure 2) on its external cylindrical surface of spool.Spool base 9 is a T shape, and its boss stretches in the valve core housing 10, contacts with spool 11 to be that plane contact, other end are sphere shape, to guarantee spool 11 and spool base 9 good plane contact is arranged, and improves sealing.Water supply connector 7 and water output connector 8 inner bodies are provided with in proper order just in time opposite, and the ball ring 13 of water supply connector 7 contacts with the pump housing 5 internal surfaces with the spool base 9 of water output connector 8, and its water port, center is communicated with the blind hole bottom.The water that accumulates for the ease of discharge is all having spillway hole (14,15 and 16) between the plunger bushing 4 and the pump housing 5 and between the end of water supply connector 7, water output connector 8 and the pump housing 5.

Claims

1, a kind of ultrahigh pressure plunger pump one-way valve, it is characterized in that by the pump housing (5), plunger bushing (4), plunger rod (1), water supply connector (7) and water output connector (8) are formed, plunger rod (1) and plunger bushing (4) are installed in the blind hole (6) at the pump housing (5) center, water supply connector (7) and water output connector (8) are symmetricly set in the pump housing (5) end, from-inner-to-outer is equipped with spool base (9) in the endoporus of water supply connector (7), valve core housing (10), spool (11), pressure spring (12) and ball ring (13), from-inner-to-outer is equipped with ball ring (13) in the endoporus of water output connector (8), pressure spring (12), valve core housing (10), spool (11) and spool base (9), spool base (9) and ball ring (13) have central through bore, on the cylndrical surface of spool (11), have some axial water-flowing troughs, spool (11) is a plane contact with contacting of spool base (9), the ball ring (13) of water supply connector (7) and the spool base (9) of water output connector (8) are close to the pump housing (5), its central through bore is communicated with the pump housing (5) blind hole (6) bottom, and spool base (9) central through bore of water supply connector (7) and the central through bore of water output connector (8) are communicated with the water inlet of water supply connector (7) and the osculum of water output connector (8) respectively.

2, one-way valve according to claim 1 is characterized in that spool base (9) is T shape, and its boss stretches in the valve core housing (10) and contacts with spool, and the other end is a sphere shape.