CN2823729Y

CN2823729Y - Check valve

Info

Publication number: CN2823729Y
Application number: CN 200520046016
Authority: CN
Inventors: 朱沛福
Original assignee: SHANGHAI MAIDONG ELECTRICAL APPLIANCE CO Ltd
Current assignee: SHANGHAI MAIDONG ELECTRICAL APPLIANCE CO Ltd
Priority date: 2005-10-28
Filing date: 2005-10-28
Publication date: 2006-10-04
Anticipated expiration: 2015-10-28

Abstract

The utility model relates to a check valve for a high-pressure hydraulic pump, which is composed of a valve sleeve, a valve seat, a valve core and a return spring, wherein a section view shape of the valve sleeve is in a concave-shaped structure. The center of the valve sleeve is provided with a through hole of the valve sleeve, and the valve sleeve is sheathed on the valve seat. The middle lower part of the outside of the valve seat is provided with a groove for holding an O-shaped sealing ring, and the center is provided with the through hole of the valve seat. The valve core is in a mushroom structure, and a mushroom-shaped end surface is tightly sealed with the valve seat. The other end is provided with a cross-shaped guiding axle. The return spring is sheathed at the outside of the cross-shaped guiding axle, one end is sheathed on the mushroom-shaped valve core, and the other end is inserted on an inner race of the valve sleeve. The utility model has the advantages that the check valve is not compacted on a pump body by a cap nut, but is compacted and fixed by the upper body of the high-pressure hydraulic pump. The thread processing of components and a pump body is reduced, and the cost is low. The valve core is provided with the cross-shaped guiding axle, and the motion of the valve core is stable. The valve core has small frictional force with the valve sleeve, and the reaction is agile. The open and reset of the valve core and the valve seat are fast, and the sealing performance is good.

Description

One-way valve

Technical field

The utility model relates to high-pressure water pump, particularly a kind of high-pressure water pump one-way valve.

Background technique

Present high-pressure water pump one-way valve, its means of fixation, be to be pressed on the pump housing with nut, sealing makes valve seat be subjected to very big pressure by the valve seat end face seal, ftractures easily through the bump repeatedly of spool, and valve body will carry out screw thread processing, be stained with the aluminium bits on the valve seat easily, spool can not be sealed fully with valve seat, cause one-way valve to lose efficacy.

Summary of the invention

The purpose of this utility model provides a kind of novel high-pressure water pump one-way valve, and spool is provided with the axis of guide, and valve core movement is stable little with valve pocket frictional force, and reaction is flexible, one-way valve and pump housing radial seal, good airproof performance.

For reaching above-mentioned purpose, the utility model is made of valve pocket, valve seat, spool and return spring, and wherein the valve pocket cross-sectional shape is " recessed " shape structure, and there is a valve pocket through hole at the center, is sleeved on the valve seat; The outer middle and lower part of valve seat is provided with the groove of placement " O " RunddichtringO, and there is valve seat through-hole at the center; Spool is a mushroom construction, mushroom-like end face and valve seat tight seal, and the other end has the cross axis of guide; One return spring is sleeved on spool cross axis of guide outside, and an end block set is on the mushroom-like spool, and the other end is nested on the inner race of valve pocket.One-way valve is inlaid in the high-pressure water pump lower body, and its high-pressure water pump upper body, top is fixed.

The utility model has the advantages that: the means of fixation of one-way valve, not to be pressed on the pump housing, but be fixed by the high-pressure water pump upper body with nut, reduce parts and pump housing screw thread and add, reduce cost.It is stable that spool is provided with the cross axis of guide, valve core movement,, reaction little with the frictional force of valve pocket flexibly, spool and valve seat are opened and are resetted soon one-way valve and pump housing radial seal, good airproof performance.

Description of drawings

Fig. 1 is an one-way valve structures sectional view of the present utility model.

Fig. 2 is one-way valve of the present utility model and pump housing fixed structure partial sectional view.

Fig. 3 is a valve pocket sectional structure chart of the present utility model.

Fig. 4 is the side view of Fig. 3.

Fig. 5 is the utility model spool sectional structure chart.

Fig. 6 is the side view of Fig. 5.

Label declaration in the accompanying drawing:

1-valve pocket through hole, 2-return spring;

3-spool, 31-axis of guide

4-valve seat through-hole; 5-valve seat;

6-" O " RunddichtringO 7-valve pockets;

8-high-pressure water pump lower body, 9-high-pressure water pump upper body;

10-pump housing osculum, 11-pump housing water inlet.

Embodiment

See also shown in Fig. 1,2, the utility model is made of valve pocket 7, valve seat 5, spool 3 and return spring 2, wherein, the cross-sectional shape of valve pocket 7 is " recessed " shape structure, there is a valve pocket through hole 1 at the center, be sleeved on the valve seat 5, valve seat 5 outer middle and lower parts are provided with the groove of placement " O " RunddichtringO 6, and there is valve seat through-hole 4 at the center; Spool 3 is a mushroom construction, mushroom-like end face and valve seat 5 tight seals, and the other end has the cross axis of guide 31, and the axis of guide 31 can slide in valve pocket through hole 1; (seeing shown in Fig. 5,6); One return spring 2 is sleeved on spool cross axis of guide outside, and an end block set is on mushroom-like spool 3, and end is nested on the inner race of valve pocket 7 in addition.Whole one-way valve is inlaid in the high-pressure water pump lower body 8 (seeing shown in Figure 2), and the one-way valve top is fixed by high-pressure water pump upper body 9, rather than with nut compressing on the pump housing, the one-way valve and the pump housing lean on radial seal, good airproof performance.

Working procedure:

When press water when come in pump housing water inlet 11, press to the elastic force that spool 3 overcomes return spring 2 by valve seat through-hole 4, spool 3 is moved up, spool 3 breaks away from valve seats 5, press water flows out from pump housing osculum 10 by valve pocket through hole 1.When press water no longer pours in or the pressure at pump housing osculum 10 places and the elastic force sum of return spring 2, during greater than the pressure at 11 places, pump housing water inlet, spool 3 is resetted immediately, spool 3 seals with valve seat 5.

Claims

1, a kind of one-way valve is made of valve pocket, valve seat, spool and return spring, it is characterized in that:

The cross-sectional shape of valve pocket is " recessed " shape structure, and there is a valve pocket through hole at the center, is sleeved on the valve seat;

The outer middle and lower part of valve seat is provided with the groove of placement " O " RunddichtringO, and there is valve seat through-hole at the center;

Spool is a mushroom construction, mushroom-like end face and valve seat tight seal, and the other end has the cross axis of guide;

One return spring is sleeved on spool cross axis of guide outside, and an end block set is on the mushroom-like spool, and the other end is nested on the inner race of valve pocket.

2, one-way valve according to claim 1 is characterized in that:

One-way valve is inlaid in the high-pressure water pump lower body, and its top is fixed by the high-pressure water pump upper body.